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Shale primary porosimetry based on 2D nuclear magnetic resonance of T_(1)-T_(2)

Energy Geoscience 2024年第3期5卷 52-65页

作者： Junliang Li Min Wang Min Wang Jinbu Li Xinbin Zhao Xingzhong Hu Aibing Fu exploration and Development Research Institute of shengli oilfield company DongyingShandong257015China School of Geosciences and Technology China University of Petroleum(East China)QingdaoShandong266580China oil and gas exploration management center of shengli oilfield company DongyingShandong257015China

Porosity,a key parameter in assessing the physical properties of shale reservoirs and the reserves,is of great significance to the selection and evaluation of shale sweet *** are many methods at present to characterize shale porosity,most of which are aimed at post-core cleaning shale,such as those involving helium and saturated fluid(namely liquid-involved porosimetry).However,due to the low efficiency of shale core cleaning and the possible damage to pore structure during the core cleaning process,it's hard to guarantee the accuracy of porosity *** this regard,we resort to the two-dimensional(2D)nuclear magnetic resonance(NMR)technology of T1-T2 in characterizing the primary shale porosity with samples taken from pressure coring in the 4th member of Shahejie Formation(Sha 4 Member)in well Fanxie 184 in the Jiyang ***,comparative experiments of shale porosity measurement by three methods,namely the simultaneous distillation extraction(SDE),helium and fluid measurement,are carried out *** results show that the values obtained by SDE,gas and liquid measurement are similar,which are about 0.6 times of 2D NMR *** cleaning efficiency tends to seriously affect the results involving gas and *** addition,the core cleaning treatment is bound to change the shale pore structure,and this is especially true in clay which tends to swell;consequently,porosity results are to be distorted by gas and liquid *** is thereby recommended to utilize the 2D NMR technology to characterize the primary total porosity of shale samples without core *** effective porosity of samples from pressure coring is determined by T2 cutoff value of around 0.3 ms.

关键词： Shale Porosity Nuclear magnetic resonance(NMR) Core cleaning Jiyang Depression

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An Experimental Analysis of gas-Liquid Flow Breakdown in a T-Junction

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Fluid Dynamics & Materials Processing 2024年第6期20卷 1381-1392页

作者： Lihui Ma Zhuo Han Wei Li Guangfeng Qi Ran Cheng Yuanyuan Wang Xiangran Mi Xiaohan Zhang Yunfei Li Technical Inspection center Sinopec Shengli Oilfield CompanyDongying257000China New Energy Development center Sinopec Shengli Oilfield CompanyDongying257000China China National oil and gas exploration and Development company Ltd.Beijing100034China

When a gas-liquid two-phase flow(GLTPF)enters a parallel separator through a T-junction,it generally splits *** phenomenon can seriously affect the operation efficiency and safety of the equipment located *** order to investigate these aspects and,more specifically,the so-called bias phenomenon(all gas and liquid flowing to one pipe,while the other pipe is a liquid column that fluctuates up and down),laboratory experiments were carried out by using a T-junction connected to two parallel vertical ***,a GLTPF prediction model based on the principle of minimum potential energy was *** research results indicate that this model can accurately predict the GLTPF state in parallel *** boundary of the slug flow and the churn flow in the opposite pipe can be ***,according to the results,the pressure drop curves of the two-phase flow in the parallel risers are basically the same when there is no bias phenomenon,but the pressure drop in the parallel riser displays a large deviation when there is a slug flow-churn *** when the parallel riser is in a state of asymmetric flow and one of the risers produces churn flow,the two-phase flow is prone to produce the bias phenomenon.

关键词： Two-phase flow T-junction split model entrance effect mechanism model improved model

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Astronomical forcing and sedimentary noise modeling of lake-level changes in the Middle Eocene Chezhen Sag,Bohai Bay Basin,eastern China

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Frontiers of Earth Science 2024年第2期18卷 446-459页

作者： Xuwei LUAN Jinliang ZHANG Na LI Tao CHEN Long SUN Xuecai ZHANG Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China College of Geosciences China University of Petroleum(Beijing)Beijing 102249China management center of oil and gas exploration Sinopec Shengli OilfieldDongying 257000China

The accurate determination of geological age is a key to understanding the history and process of paleolake evolution and oil and gas exploration in continental lake ***,improving the accuracy of geological age has always been a difficult scientific problem.A 609-m-thick,continuous lacustrine mudstone and sandstone succession in Chezhen Sag(eastern China)provides an ideal middle Eocene sedimentary record for establishing a high-resolution stratigraphic chronology *** on spectrum analysis and sliding window spectrum analysis of the natural gamma(GR)logging data of well Che 271(C271)in Chezhen Sag,the periods of 405 kyr and 40.1 kyr were filtered by a Gaussian bandpass filter,and a“floating”astrochronological time scale(ATS)was *** total number of 405 kyr eccentricity cycles were 13.6 and 40.1 kyr obliquity cycles were 138 which recorded from the upper member 4(Es4U)to the member 3(Es3)of the Eocene Shahejie Formation,and the depositional duration was 5.53 *** Coefficient(COCO)analysis and evolutionary Correlation Coefficient(eCoCo)analysis found that the optimal sedimentary rate of different *** noise simulation revealed the history of paleolake water changes in the Middle Eocene in the Chezhen Sag,according to which four sequences are *** study shows that the lake level change of Chezhen Sag in the middle Eocene shows prominent 1.2 Myr cycles and an antiphase well-coupled relationship with obliquity ***,we propose a model to explain the relationship between the orbital cycle and lake level change in the continental lake *** the obliquity of the earth increases,the middle and high latitudes of the earth will be closer to the sun,the direct sunlight will be higher,and the meridional sunshine will increase,thus accelerating the evaporation process of lake basin *** the seasonal changes are obvious(maximum period of 1.2 Myr ultra-long obliquity),this effect is more signific

关键词： Chezhen Sag cyclostratigraphy astrochronological time scale sedimentary noise

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Formation mechanism of fault accommodation zones under combined stress in graben basin:Implications from geomechanical modeling

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Petroleum Science 2024年第1期21卷 54-76页

作者： Qi-Qiang Ren Jin-Liang Gao Rong-Tao Jiang Jin Wang Meng-Ping Li Jian-Wei Feng Institute of Sedimentary Geology Chengdu University of TechnologyChengdu 610059SichuanChina PetroChina Research Institute of Petroleum exploration and Development Beijing100083China Jianghan oilfield oil and gas Production Capacity Construction management center Chongqing408000China Sinopec Chongqing Fuling Shale gas exploration and Development company Chongqing408000China College of Energy Chengdu University of TechnologyChengdu 610059SichuanChina School of Geoscience China University of Petroleum(East China)Qingdao 266580ShandongChina

A fault accommodation zone is a type of structure that is defined as regulating displacement and strain between faults *** numbers of fault accommodation zones are being identified in graben basins,indicating the potential exploration target and petroleum accumulation *** study aims to analyze the formation mechanism and development of fault accommodation zones under combined stress by a numerical simulation method considering geomechanical *** three-dimensional(3-D)seismic interpretation and fractal dimension method,exampled with the Dongxin fault zone,the fault activity and fault combination pattern were conducted to quantitatively characterize the activity difference in fault accommodation *** with mechanical experiment test,a geomehcanical model was established for fault accommodation zones in a graben *** the paleostress numerical simulations and structural physical simulation experiment,the developmental characteristics and genetic mechanism of fault accommodation zones were *** by multi movements and combined stresses,three significant tectonic evolution stages of the Dongxing Fault Zone(DXFZ)were distinguished:During the E_(s)^(3)sedimentary period,the large difference in the stress,strain,and rupture distribution in various faults were significant,and this stage was the key generation period for the prototype of the DXFZ,including the FAZ between large-scale *** the E_(s)^(2)sedimentary period,the EW-trending symmetric with opposite dipping normal faults and the NE-SW trending faults with large scale were furtherly *** junction area of two secondary normal faults were prone to be ruptured,performing significant period for inheriting and developing characteristics of fault accommodation *** the Es1 sedimentary period,the high-order faults in the DXFZ exhibited the obvious fault depressions and strike-slip activity,and the fault accommodation zones were

关键词： Fault accommodation zone Graben basin Fault activity Tectonic physical simulation experiment Finite element numerical simulation Dongxin fault zone

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Age assignment of the Upper Carboniferous Arbasay Formation in Shichang Region,North Tianshan(NW China)

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Journal of Palaeogeography 2018年第3期7卷 272-282页

作者： Jia-Lin Wang Chao-Dong Wu Xi Jiang Wen Zhu Jun Wu Jun Wang Meng-Lin Zheng Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of Education School of Earth and Space Sciences Peking University Institute of oil & gas Peking University Department of Xinjiang exploration Project management Smopec Shengli Oilfield Company Research Institute of exploration and Development Xinjiang Oilfield CompanyPetro China

The North Tianshan Orogenic Belt contains the youngest ophiolites in the Tianshan and provides some information on timing of the last closure of the Junggar-Balkhash Ocean. LA-ICP-MS zircon U-Pb dating was conducted to define the formation age of the Arbasay Formation in the Shichang Region of North Tianshan, which is exposed near the suture zone but its age remains debated. The Arbasay Formation is mainly composed of volcanic and volcaniclastic rocks with tuft interlayers. The zircons from the tufts yield two age populations of 315 ± 3 Ma and 304 ± 2 Ma, constraining the commencement and demise timings of volcanism, respectively. Furthermore, zircon U-Pb age spectra of the tuffaceous sandstones display the youngest peak age at 308 Ma, indicating a 〈 308 Ma age for the depositional age of volcaniclastic rocks. The volcaniclastic rocks therefore were likely to deposit together with the syn-sedimentary volcanism during Late Carboniferous. This means that the Arbasay Formation in Shichang Region should be re-assigned to Late Carboniferous in age. Given that the Arbasay Formation was likely to be formed during the tectonic transition from compression to extension, the Junggar-Balkhash Ocean possibly closed during Late Carboniferous.

关键词： Xinjiang LA-ICP-MS zircon U-Pb dating Stratigraphic age Volcaniclastic rock Junggar-Balkhash Ocean

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Shale pore characteristics of Shahejie Formation: Implication for pore evolution of shale oil reservoirs in Dongying sag, north China

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Petroleum Research 2019年第2期4卷 113-124页

作者： Shun Zhang Huimin Liu Min Wang Xinjin Liu Huilai Liu Youshu Bao Weiqing Wang Runze Li Xin Luo Zhengwei Fang Research Institute of Petroleum exploration and Development Sinopec Shengli Oilfield CompanyShandongDongying257022China Postdoctor Scientific Research Stations Sinopec Shengli Oilfield CompanyShandongDongying257000China Petroleum Development center of shengli oilfield ShandongDongying257022China Petroleum Development center of shengli oilfield Beijing100007China Chongqing gas Field of PetroChina Southwest oil&gasfield company Chongqing400021China

The pore characteristics of shale reservoirs in the lower submember of Member 3 to upper submember of Member 4 of Shahejie Formation in Dongying sag are analyzed,influences of mineral content and organic matter content on porosity and pore size are also investigated,and through the diagenetic thermal simulation experiment,the main pore evolution is further *** results show that the pore structure of shale reservoirs is complex,the micron-nanometer pores can storage liquid hydrocarbons,and the free-phase crude oil is mainly distributed in intergranular dissolution pores of calcite,recrystallized intergranular pores,intergranular shrinkage fractures of clay mineral which have large pore *** minerals and organic matter content directly influence porosity and pore size of shale reservoirs,relationship between porosity and content of felsic mineral as well as content of organic matter content is linear and positive,while relationship between content of carbonated mineral is *** the buried depth from 2500 to 3500 m,concentration of organic acid from hydrocarbon generation and expulsion of organic matter,increasing range of pressure coefficient,are well corresponding to highporosity intervals;pore formation in shale oil reservoirs are almost controlled by diagenetic evolution of clay minerals;framework storage spaces formed by carbonate grain crystals as well as intergranular and intergranular dissolution pores of carbonate increases porosity of shale oil reservoirs;local increase of porosity at the depth of 3500e3800 m is mainly caused by coupling of hydrocarbon-generating overpressure and dissolution,and size,distribution and connectivity of pores are enhanced obviously.

关键词： Shale oil Pore and fracture Diagenesis Clay mineral transformation Dissolution Recrystallization Hydrocarbon-generation and acid expulsion Paleogene Dongying sag

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Calculating single layer production contribution of heavy oil commingled wells by analysis of aromatic parameters in whole-oil GC-MS

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Petroleum Science 2014年第1期11卷 89-96页

作者： Xu Yaohui Ma Li Li Linxiang Cui Wenfu Cheng Xiaowei Wang Xiaoping Institute of Geomechanics Chinese Academy of Geological Sciences Key Laboratory of exploration Technologies for oil and gas Resources of Ministry of Education Yangtze University Gudong oil Production Plant of shengli oilfield Subsidiary company SINOPEC

Traditional fluid production profile logging is not usually suitable for heavy-viscous crude oil *** of heavy oil can lead to the loss of n-alkanes,and the use of chromatogram fingerprint techniques in studying the production contributions of single layers in heavy oil commingled wells has ***,aromatic compounds are relatively well *** took the heavy oil commingled wells of small layers NG55 and NG61 in the ninth area of the Gudong oil field as *** on the principle of chromatography,the whole-oil GC-MS was used,and the aromatic parameters which have a strongly linear relationship with the ratio of mixed two end member oils were verified and selected in *** showed that the ratio of （1,4,6-＋ 2,3,6-trimethylnaphthalene） to 1,2,5-trimethylnaphthalene has a strongly linear relationship with the ratio of the mixed two end member oils （R2=0.992）.The oil contributions from single layers NG55 and NG61 in six commingled heavy oil wells were calculated using established charts and this *** calculated results are consistent with the results of long period dynamic monitoring and logging interpretation in the study area and can provide a scientific basis for monitoring production performance and hierarchical management of *** study provides a new geochemical method for calculation of the contributions of single layers in heavy oil commingled wells when conventional fluid production profile logging is not suitable.

关键词： Whole-oil GC-MS aromatic parameters commingled producing wells single layer production the ninth area of the Gudong oilfield

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Title Supersonic Condensation and Separation Characteristics of CO_(2)-Rich Natural gas under Different Pressures

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Energy Engineering 2023年第2期120卷 529-540页

作者： Yong Zheng Lei Zhao YujiangWang Feng Chang Weijia Dong Xinying Liu Yunfei Li Xiaohan Zhang Ziyuan Zhao Engineering management center Sinopec Shengli Oilfield CompanyDongying257000China Technical Inspection center Sinopec Shengli Oilfield CompanyDongying257000China Shandong Provincial Key Laboratory of oil&gas Storage and Transportation Safety College of Pipeline and Civil EngineeringChina University of PetroleumQingdao266580China

Supersonic separation technology is a new natural gas sweetening method for the treatment of natural gas with high CO_(2)(carbon dioxide)*** structures of the Laval nozzle and the supersonic separator were designed,and the mathematical models of supersonic condensation and swirling separation for CO_(2)-CH4 mixture gas were *** supersonic condensation characteristics of CO_(2) in natural gas and the separation characteristics of condensed droplets under different inlet pressures were *** results show that higher inlet pressure results in a larger droplet radius and higher liquid phase mass fraction;additionally,the influence of centrifugal force is more pronounced,and the separation efficiency and removal efficiency of CO_(2) are *** the inlet pressure is 6 and 9 MPa,the liquefaction efficiency at the Laval nozzle outlet increases from 56.90%to 79.97%,and the outlet droplet radius increases from 0.39 to 0.72μm,and the removal efficiency is 31.25%and 54.52%,*** effects of inlet pressures on the removal efficiency of the supersonic separator are complicated and are controlled by the combined effects of liquefaction capacity of the nozzle and centrifugal separation capacity of the swirl vane.

关键词： Supersonic separator Laval nozzle natural gas carbon dioxide condensation separation

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Quantitative reconstruction of the palaeoclimate of the Shahejie Formation in the Chezhen Depression,Bohai Bay Basin,eastern China

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Frontiers of Earth Science 2021年第4期15卷 909-921页

作者： Tao CHEN Jinliang ZHANG Yang LI Yongfu ZHAO Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China Hubei Key Laboratory of Petroleum Geochemistry and Environment Yangtze UniversityWuhan 430100China oil and gas exploration management center Shengli OilfieldSinopecDongying 257000China

This paper uses pollen climate analysis and coexistence analysis to systematically analyze the climatic evolution of the Shahejie Formation in the Chezhen Depression,Bohai Bay Basin,eastern China and discusses the relationship between palaeoclimatic evolution and lake level *** results show that the sedimentary period of the Shahejie Formation in the Chezhen Depression had an overall temperature change trend from hot to cold and simultaneously experienced a dry and wet balance-wet-dry and wet balance-wet transition *** climatic parameters of the Shahejie Formation in the Chezhen Depression include a mean annual temperature of 8.1℃-15.1℃,a mean coldest monthly temperature of-0.1℃-2℃,a mean warmest monthly temperature of 18.6℃-28℃,a mean annual precipitation of 389-1164 mm,a wettest monthly precipitation amount of 215-262 mm,and a driest monthly precipitation amount of 8-48 *** change is believed to affect the rise and fall of lake levels to some *** quantitative reconstruction of these climatic parameters allows researchers to more intuitively understand the geological background of the Chezhen Depression and guide the exploration and development of oil and gas resources.

关键词： Shahejie Formation Chezhen Depression pollen coexistence analysis palaeoclimate reconstruction

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Paleosalinity and lake level fluctuations of the 3rd Member of Paleogene Shahejie Formation,Chezhen Sag,Bohai Bay Basin

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Frontiers of Earth Science 2022年第4期16卷 949-962页

作者： Long SUN Jinliang ZHANG Yang LI Xue YAN Xuecai ZHANG Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China Hubei Key Laboratory of Petroleum Geochemistry and Environment Yangtze UniversityWuhan 430100China oil and gas exploration management center Sinopec Shengli OilfieldDongying 257000China

The Chezhen Sag,located in the north-western Jiyang Depression,is one of the most important oil-bearing sags in the Bohai Bay *** to the low degree of exploration in the sag,paleosalinity and sedimentary environment of the sag in the 3rd Member of Paleogene Shahejie Formation(Es3)is not *** the paleosalinity and lake level fluctuations is helpful for understanding organic matter rich rocks ***,a detailed geochemical,mineralogical and paleontological analysis of the Es3 in the Chezhen Sag was *** like Sr/Ba ratios,B/Ga ratios,equivalent boron content and methods concluding Adams'formula and Couch's method were adopted to reveal the paleo-salinity and lake level *** results indicate that the lower submember(Lower Es3)was deposited in a salt water with high salinity,accompanied by dry climate and transgression *** middle submember(Middle Es3)and upper submember(Upper Es3)record a freshwater to brackish *** paleosalinity and paleoclimate changes are consistent with the global sea level *** type and content of sporopollen indicate a dry climate in Lower Es3,which further confirms the reliability of the reconstruction results of *** with the paleoclimate and previous marine paleontological evidence,we proposed that the high salinity period is associated with a high lake level and a large-scale transgression event in Lower *** to salinities and corresponding Lake depths,we established a sedimentary environment variation model of the Es3 Member in Chezhen Sag.

关键词： Chezhen Sag paleosalinity paleoclimate boron lake level

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