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Control of different occurrence types of organic matter on hydrocarbon generation in mudstones

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Petroleum Science 2022年第4期19卷 1483-1493页

作者： Peng-Yan Du Jin-Gong Cai Qing Liu Xue-Jun Zhang Juan Wang State Key Laboratory of Marine Geology Tongji UniversityShanghai200092China Exploration and Development Research Institute of shengli oilfield Company SINOPECDongyingShandong 257001China

Organic matter(OM) is preserved as different occurrences in mudstones, which can affect the hydrocarbon generation process. However, little research has focused on hydrocarbon generation as a function of different occurrences of OM. This study collected a suite of mudstones in the dongying.Sag, Bohai Bay Basin, and conducted Rock-Eval Ⅵ pyrolysis after Soxhlet extraction and Na_(2)S_(2)O_(8) oxidation, aiming to quantify the OM with different occurrences and figure out the contributions of each occurrence of OM to the hydrocarbon generation. There are three types of occurrences of OM: soluble organic matter(SOM),mineral-bound organic matter(MOM), and particulate organic matter(POM). MOM is the most abundant among the three occurrence types of OM. SOM and MOM are the main hydrocarbon precursors, and their hydrocarbon contributions alternate with different kerogen types and layers. Additionally, MOMcontributed hydrocarbons are numerous at shallow depths;SOM-contributed hydrocarbons mainly occur at deep depths;and POM-contributed hydrocarbons change little with depth. These results demonstrate that MOM should be the main hydrocarbon precursor in shallow formations and that SOM is the main hydrocarbon contributor at deep depths.

关键词： Soluble organic matter Mineral-bound organic matter Particulate organic matter Hydrocarbon precursor Rock-EvalⅥpyrolysis

The Three-layer Structure and Systems of Petroleum Migration and Accumulation of Continental Basins

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Petroleum Science 2007年第1期4卷 10-20页

作者： Xu Huaimin Wang Zhigao Zhang Shanwen Liu Taixun Wu Lei School of Resources and Information China University of Petroleum Beijing 102249 China sinopec.shengli oilfield Company Dongying Shandong 257000 China

The concept of the three-layer structure of continental basins is presented based on the characteristics of layered structure of basins. The reservoir could be classified into accumulation system assemblage, accumulation system, accumulation assemblage and reservoir. This paper discusses the characteristics of hydrocarbon accumulation system assemblages of the Zhanhua Depression, which include four kinds of genetic patterns：（1） buried-hill hydrocarbon accumulation system assemblage; （2） self-sourced accumulation system assemblage from the upper interval of member 4 to member 1 of Shahejie formation; （3） transition accumulation system assemblage from member 1 of the Shahejie formation to dongying.formation and （4） externally sourccd accumulation system assemblage in the late Tertiary. The hydrocarbon-source transport network layer consisted of faults and unconformities, which connected with the reservoir layer.

关键词： Basin structure hydrocarbon accumulation system accumulation assemblage Zhanhua Depression

Genetic mechanisms and control on hydrocarbon accumulation in transtensional structures: A case study of Gaoqing area, northern dongying.Sag, china

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Energy Geoscience 2023年第3期4卷 203-209页

作者： Juan He Weizhong Zhang Exploration&Production Research Institute SINOPECBeijing102206China Geophysical Research Institute of shengli oilfield Company SINOPECDongyingShandong257022China

Broom-shaped structures are widely seen in transtensional basins, including those discovered in many sags of the Bohai Bay Basin. Broom-shaped transtensional structural zones are generally petroliferous and thus important targets for hydrocarbon exploration. This study analyzed the evolution and genetic mechanisms of the broom-shaped transtensional structures in the Gaoqing area of the dongying.Sag using the 3D seismic flattening technique and a physical simulation experiment. Furthermore, the control effects of the broom-shaped transtensional structures on hydrocarbon accumulation and distribution were discussed. The research results are as follows. The Gaoqing area is of a broom-shaped transtensional structure in planar view, composed of several arc-shaped secondary faults intersecting with high-level main fault in the same direction. On the seismic section, it appears as a typical semi-flower-like structure. In the early stage (that is, during the deposition of the Kongdian Formation to the lower submember of the 4th member of the Shahejie Formation, Es4(L)), single-fault pattern consisting of single or multiple faults in alignment was developed under extensional stress. While with the change of structural stress (that is, during the deposition of the Es4(U) to the Es2(L)), more secondary faults were formed, and came in a pattern of broom-shaped structure together with the major fault. In the late stage (that is, during the deposition of the Es1 to the Guantao Formation), the en echelon fault pattern was formed, as the major fault broke into multiple secondary faults. The divergent end of the broom-shaped transtensional structure has many secondary faults developed, the fault planes are gentle, and small-scale fan deltas are the predominant type of deposits. The hydrocarbon tends to laterally migrate far away and accumulate mianly in structural and lithologic-structural traps. On the other hand, in the convergent end, the fault planes are relatively steep, result

关键词： Broonn-shaped tanstensional stucture Physical sirulation Genetic mechanism Contol on hydrocarbon accunulation Gaoqing area dongying.sag

Shale Lithofacies and Sedimentary Environment of the Third Member,Shahejie Formation,Zhanhua Sag,Eastern china

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Acta Geologica Sinica(English Edition) 2022年第3期96卷 1024-1040页

作者： ZHU Xiaomin ZHANG Meizhou ZHU Shifa DONG Yanlei LI Chao BI Yuequan MA Lichi State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China shengli oilfield Company SinopecDongyingShandong 257000China

Researches into shale lithofacies,their sedimentary environments and relationship benefit understanding both of sedimentary cycle division and unconventional hydrocarbon exploration in lacustrine *** on a 100~300-m-thick dark shale,mudstone and limestone encountered in the lower third member of the Eocene Shahejie Formation(Es3l member)in Zhanhua Sag,Bohai Bay Basin,eastern china,routine core analysis,thin sectioning,scanning electron microscopy(SEM),mineralogical and geochemical measurements were used to understand detailed facies characterization and paleoclimate in the *** Es3l shale sediment includes three sedimentary cycles(C3,C2 and C1),from bottom to top,with complex sedimentary characters and spatial *** terms of the composition,texture,bedding and thickness,six lithofacies are recognized in this *** geochemical parameters,such as trace elements(Sr/Ba,Na/Al,V/Ni,V/(V+Ni),U/Th),carbon and oxygen isotopes(δ^(18)O,δ^(13)C),and total organic carbon content(TOC)indicate that the shales were deposited in a deep to semi-deep lake,with the water column being salty,stratified,enclosed and *** cycles C3 and C2 of the middle-lower sections,the climate was arid,and the water was salty and *** and laminar mudstone-limestone was deposited with moderate organic matter(average TOC 1.8%)and good reservoir quality(average porosity 6.5%),which can be regarded as favorable *** the C1 cycle,a large amount of organic matter was input from outside the basin and this led to high productivity with a more humid *** calcareous mudstone was deposited,and this is characterized by high TOC(average 3.6%)and moderate porosity(average 4%),and provides favorable source rocks.

关键词： unconventional energy resources shale lithofacies sedimentary environment Shahejie Formation Zhanhua Sag Bohai Bay basin

Deformation characteristics and analog modeling of transtensional structures in the dongying.Sag,Bohai Bay Basin

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Frontiers of Earth Science 2024年第1期18卷 227-241页

作者： Dawei DONG Li ZHAO Weizhong ZHANG Jiyan LI Ruixiang ZHANG Jianlei YANG Guangzeng WANG shandong Institute of Petroleum and Chemical Technology Dongying 257061China College of Resources and Environment Shandong Agriculture UniversityTai᾽an 271018China Geophysical Research Institute of shengli oilfield Branch Company SINOPECDongying 257022China Research Institute of Petroleum Exploration&Development Shengli Oilfield CompanySINOPECDongying 257000China College of Marine Geosciences Ocean University of ChinaQingdao 266100China

Hydrocarbon exploration in the dongying.Sag is constrained by the development of many Cenozoic transtensional structures with complex patterns and dynamic *** study uses seismic interpretation and analog modeling to investigate these transtensional *** results include dividing these transtensional structures into boundary fault,oblique rifting,and deep strike-slip fault controlled structures,according to the relationships between main and secondary *** developed in the steep slope zone,the central sag zone,and the slope zone,*** profile,the transtensional structures formed appear to be semi-flower-like,step-like,or *** plan-view,they appear to be broom-like,soft-linked,or en-echelon ***,these transtensional structures are controlled by the oblique normal slip of boundary faults,by the oblique extension of sub-sags,and by the later extension of deep strike-slip *** geometric deformation of these transtensional structures is controlled by the angles between the regional extension direction and the strike of boundary faults,deep faults,or sub-sags,where a larger angle corresponds to less developed transtensional ***,the transtensional structures in the dongying.Sag were created by multi-phase and multi-directional extensions in the Cenozoic—which is also controlled by pre-existing *** strike of newborn secondary faults was determined by the regional extension direction and pre-existing structures.

关键词： transtensional structure seismic interpretation analogue modeling dynamic mechanism dongying.Sag

PETROLEUM GEOLOGY AND RECOVERY EFFICIENCY

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油气地质与采收率 2014年第2期21卷 I0001-I0008页

作者： Wang Duanping shengli oilfield Company SINOPEC Dongying City Shandong Province 257001 China

Tight sandstone reservoir sensitivity and damage mechanism analysis: A case study from Ordos Basin, china and implications for reservoir damage prevention

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Energy Geoscience 2022年第4期3卷 394-416页

作者： Zhongquan Liu Bingbing Shi Tianchen Ge Fenggui Sui Yue Wang Pengfei Zhang Xiangchun Chang Ye Liu Yongrui Wang Zhaoyang Wang Petroleum Exploration and Development Research Institute Shengli Oilfield Company of SINOPECDongying257015China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdaoShandong266590China Institute of Western Frontier Area Shengli Oilfield CompanySINOPECDongying257000China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao266071China

Analysis of reservoir sensitivity to velocity,water,salt,acid,alkali and stress is critical for reservoir *** study the tight sandstone reservoir sensitivity at different formation depths(effective stress)and formation water conditions(pH,salinity,and fluid velocity),a series of dynamic core flow tests under different pH,salinity,acid,and effective stress conditions were performed on samples from tight sandstone reservoirs of the Upper Triassic Yanchang 8(T_(3)y^(8))Member and conventional reservoirs of the Middle-Lower Jurassic Yan'an 9(J_(1-2)y^(9))Member in the Ordos *** results indicate that,compared with the conventional reservoirs,the tight sandstone reservoirs are more sensitive to velocity and stress,less sensitive to water,alkali and salinity,and respond better to acid *** addition,the critical conditions(salinity,velocity,pH,and stress)for pumping drilling,completion,and fracturing fluids into tight sandstone reservoirs were investigated.A combination of scanning electron microscopy coupled with energy-dispersive spectrometry(SEM-EDS),cathodoluminescence(CL),casting thin section(CTS)and nuclear magnetic resonance(NMR)images,high-pressure mercury injection capillary pressure(MICP)measurements as well as X-ray fluorescence spectral(XRF)analyses were employed to analyze the damage mechanisms of the conventional reservoirs(J_(1-2)y^(9))and tight sandstone reservoirs(T_(3)y^(8))caused by fluid *** results suggest that reservoir sensitivity is primarily conditioned by the composition of detrital components and interstitial fillings,petrophysical properties,pore-throat structure,and diagenetic *** these factors control the sensitivity types and extent of the *** results indicate that the poorer the reservoir physical properties,the stronger the reservoir heterogeneity and sensitivity,implying that tight sandstone reservoirs are more susceptible to changes in fluids than conventional *** study offer

关键词： Formation damage prevention Reservoir sensitivity Tight sandstone reservoir Yanchang Formation Ordos basin

Control of facies/potential on hydrocarbon accumulation:a geological model for lacustrine rift basins

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Petroleum Science 2008年第3期5卷 212-222页

作者： Chen Dongxia Pang Xiongqi Zhang Shanwen Wang Yongshi Zhang Jun Key Laboratory for Petroleum Formation Mechanisms of the Ministry of Education China University of PetroleumBeijing 102249 China sinopec.shengli oilfield Co. Dongying Shandong 257000 China

The formation and distribution of hydrocarbon accumulations are jointly controlled by ＂stratigraphic facies＂ and ＂fluid potential＂, which can be abbreviated in ＂control of facies/potential on hydrocarbon accumulation＂. Facies and potential control the time-space distribution of hydrocarbon accumulation macroscopically and the petroliferous characteristics of hydrocarbon accumulation microscopically. Tectonic facies and sedimentary facies control the time-space distribution. Lithofacies and petrophysical facies control the petroliferous characteristics. Favorable facies and high porosity and permeability control hydrocarbon accumulation in the lacustrine rift basins in china. Fluid potential is represented by the work required, which comprises the work against gravity, pressure, interfacial energy and kinetic energy. Hydrocarbon migration and accumulation are controlled by the joint action of multiple driving forces, and are characterized by accumulation in the area of low potential. At the structural high, low geopotential energy caused by buoyancy control anticlinal reservoir. The formation oflithological oil pool is controlled by low interfacial energy caused by capillary force. Low compressive energy caused by overpressure and faulting activity control the formation of the faulted- block reservoir. Low geopotential energy of the basin margin caused by buoyancy control stratigraphic reservoir. The statistics of a large number of oil reservoirs show that favorable facies and low potential control hydrocarbon accumulation in the rift basin, where over 85% of the discovered hydrocarbon accumulations are distributed in the trap with favorable facies and low potentials. The case study showed that the prediction of favorable areas by application of the near source-favorable facies-low potential accumulation model correlated well with over 90% of the discovered oil pools＇ distribution of the middle section of the third member of the Shahejie Formation in the dongying.Dep

关键词： Jiyang Depression subtle trap facies controlling hydrocarbon accumulation fluid potential coupling of facies and potential

Structural Evolution of Chepaizi Uplift and its Control on Stratigraphic Deposition in the Western Junggar Basin, china

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 1060-1075页

作者： NI Minjie CHEN Shi LIU Zichao SHANG Fengkai QI Jiafu WANG Lishuang State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China College of Geosciences China University of PetroleumBeijing 102249China Exploration and Development Research Institute Shengli Oilfield CompanySINOPECDongying 257015ShandongChina

Geological mapping,interpreted cross sections,structural analyses and residual thickness maps were used to characterize the evolution of stress setting,structure and stratigraphic distribution of the Chepaizi Uplift,which is a NW-SE trending structure located in the Western Junggar *** NS-trending faults show an important transpressional phase during the Late Permian,as demonstrated by tectonic stress field and stratigraphic thickness variations.A major compressional thrusting and strike-slip phase during the Late Jurassic created a series of NW-SE faults that originated by the large-scale uplift event in the Northern *** were reactivated as thrust and dextral strike-slip *** addition,the angular unconformity observed between Jurassic and Cretaceous provide evidence of this tectonic *** of normal faults indicate that the area records southward tilting and regional derived extensional stress that took place during the *** that,thick Early Cenozoic strata are widely *** balanced cross-section highlights the evolution of stress setting and stratigraphic distribution of the Chepaizi Uplift.

关键词： structural evolution seismic section Junggar Basin Chepaizi Uplift Northern Tianshan