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Late-Stage Reservoir Formation Effect and Its Dynamic Mechanisms in complex Superimposed Basins

Acta Geologica Sinica(English Edition) 2010年第5期84卷 1055-1077页

作者： KANG Dejiang PANG Xiongqi KUANG Jun LUO Xiaorong PANG Hong LEI Lei State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing 102249 Research Institute of Petroleum Exploration and development ofdaqing oilfield co. ltd. Daqing Heilongjiang 163712 Basin and Reservoir Research Center China University of Petroleum Beijing 102249 PetroChina Xinjiang oilfield company Qaramay Xinjiang 834000 Key Laboratory. of Petroleum Resources Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029

complex superimposed basins exhibit multi-stage tectonic events and multi-stage reservoir formation; hydrocarbon reservoirs formed in the early stage have generally late-stage genesis characteristics after undergoing adjustment, reconstruction and destruction of later-stage multiple tectonic events. In this paper, this phenomenon is called the late-stage reservoir formation effect. The late-stage reservoir formation effect is a basic feature of oil and gas-forming reservoirs in complex superimposed basins, revealing not only multi-stage character, relevance and complexity of oil and gas- forming reservoirs in superimposed basins but also the importance of late-stage reservoir formation. Late-stage reservoir formation is not a basic feature of oil and gas forming reservoir in superimposed basins. Multi-stage reservoir formation only characterizes one aspect of oil and gas-forming reservoir in superimposed basins and does not represent fully the complexity of oil and gas-forming reservoir in superimposed basins. We suggest using ＂late-stage reservoir formation effect＂ to replace the ＂late-stage reservoir formation＂ concept to guide the exploration of complex reservoirs in superimposed basins. Under current geologic conditions, the late-stage reservoir formation effect is represented mainly by four basic forms： phase transformation, scale reconstruction, component variation and trap adjustment. The late-stage reservoir formation effect is produced by two kinds of geologic processes： first, the oil and gas retention function of various geologic thresholds （hydrocarbon expulsion threshold, hydrocarbon migration threshold, and hydrocarbon accumulating threshold） causes the actual time of oil and gas reservoir formation to be later than the time of generation of large amounts of hydrocarbon in a conventional sense, producing the late-stage reservoir formation effect; second, multiple types of tectonic events （continuously strong reconstruction, early-stage strong reconstru

关键词： superimposed basin late-stage reservoir formation effect late-stage reservoir formation,tectonic event geologic threshold

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Identification, evolution and geological indications of solid bitumen in shales: A case study of the first member of Cretaceous Qingshankou Formation in Songliao Basin, NE China

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Petroleum Exploration and development 2023年第6期50卷 1345-1357页

作者： LIU Bo WANG Liu FU Xiaofei HUO Qiuli BAI Longhui LYU Jiancai WANG Boyang National Key Laboratory of continental Shale Oil Northeast Petroleum UniversityDaqing163318China Exploration and development Research Institute of PetroChina daqing oilfield company Limited Daqing 163712China

On the basis of sorting out current understanding of solid bitumen (SB) in shales and taking organic-rich shales in the first member of the Cretaceous Qingshankou Formation in the Songliao Basin as an example, the definition, classification, occurrence and evolution path of SB are systemtically studied, and the indicative significance of SB reflectance (Rob) on maturity and its influence on the development of reservoir space are discussed and summarized. The results show that the difference of primary maceral types is primarily responsible for the different evolution paths of SB. Most of the pre-oil bitumen is in-situ SB with only a small amount being of migrated SB, while most of the post-oil bitumen and pyrobitumen are migrated SB. From the immature to early oil maturity stage, bituminite, vitrinite, and inertinite can be distinguished from SB based on their optical characteristics under reflected light, and alginite can be differentiated from SB by their fluorescence characteristics. Under scanning electron microscope, in-situ SB and migrated SB can be effectively identified. Rob increases linearly with increasing vitrinite reflectance (Ro), as a result of a decrease of aliphatic structure and the enhancement of aromatization of SB. Within the oil window three types of secondary pores may develop in SB, including modified mineral pores, devolatilization cracks and bubble holes. At a high maturity stage spongy pores may develop in pyrobitumen. Scanning electron microscopy combined with in-situ SEM-Raman spectroscopy can further reveal the structral information of different types of SB, thus providing crucial data for understanding for understanding OM migration paths, dynamics, and distances at micro-scale.

关键词： shale solid bitumen reflectance primary maceral difference solid bitumen evolution path reservoir space Songliao Basin Cretaceous Qingshankou Formation

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Experimental study on surface-active polymer flooding for enhanced oil recovery: A case study of daqing placanticline oilfield, NE China

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Petroleum Exploration and development 2019年第6期46卷 1206-1217页

作者： YU Qiannan LIU Yikun LIANG Shuang TAN Shuai SUN Zhi YU Yang college of Mechanical and Electrical Engineering Guangdong University of Petrochemical TechnologyMaoming 525000China School of Petroleum Engineering Northeast Petroleum UniversityDaqing 163318China School of Chemical Engineering Sichuan UniversityChengdu 610065China PetroChina daqing Oil Field co.ltd. Daqing 163002China

Experiments on surface-active polymer flooding for enhanced oil recovery were carried out by detection analysis and modern physical simulation technique based on reservoirs and fluids in daqing placanticline *** experimental results show that the surface-active polymer is different from other common polymers and polymer-surfactant systems in molecular aggregation,viscosity and flow capacity,and it has larger molecular coil size,higher viscosity and viscosifying capacity,and poorer *** surface-active polymer solution has good performance of viscosity-increasing and viscosity retention,and has good performance of viscoelasticity and deformability to exert positive effects of viscosifying and viscoelastic ***-active polymer can change the chemical property of interface and reduce interfacial tension,making the reservoir rock turn water-wet,also it can emulsify the oil into relatively stable oil-in-water emulsion,and emulsification capacity is an important property to enhance oil washing efficiency under non-ultralow interfacial *** surface-active polymer flooding enlarges swept volume in two ways:Microscopically,the surface-active polymer has mobility control effect and can enter oil-bearing pores not swept by water to drive residual oil,and its mobility control effect has more contribution than oil washing capacity in enhancing oil ***,it has plugging capacity,and can emulsify and plug the dominant channels in layers with high permeability,forcing the injected fluid to enter the layer with medium or low permeability and low flow resistance,and thus enlarging swept volume.

关键词： high water-cut oilfield reservoir surface-active polymer oil-washing efficiency swept volume plug by emulsification enhanced oil recovery

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co_2 gas emplacement age in the Songliao Basin: Insight from volcanic quartz ^(40)Ar-^(39)Ar stepwise crushing

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Chinese Science Bulletin 2010年第17期55卷 1795-1799页

作者： YUN JianBing WU HeYong FENG ZiHui MEI LianFu QIU HuaNing lKey Laboratory of Isotope Geochronology and Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Research Institute of Exploration and development Daqing Oilfield Company Ltd Daqing 163712 China Graduate University of Chinese Academv of Sciences Beijing 100049 China Key Laboratory of Tectonics and Petroleum Resources (China University of Geosciences Wuhan) Ministry of Education Wuhan 430074 China

Due to a lack of suitable minerals, the gas/oil emplacement ages have never been accurately obtained before. CH4-co2-saline- bearing secondary inclusions are found in quartz from the volcanic rocks of the Yingcheng Formation, the container rocks of the deep co2 gas reservoir in the Songliao Basin. The inclusion fluid was trapped into microcracks in quartz during the gas em- placement and accumulation, providing an optimal target for the 40Ar-39Ar stepwise crushing technique to determine the co2 gas emplacement age. 40Ar-39Ar dating results of a quartz sample by stepwise crushing yield a highly linear-regression isochron with an age of 78.4±1.3 Ma, indicating that the accumulation of the deep co2 gas reservoir in the Songliao Basin occurred in the late Cretaceous. This is the first time to report an exact isotopic age for a co2 gas reservoir, which indicates that the 40Ar-39Ar dating can serve as a new technique to date the oil/gas emplacement ages.

关键词：二氧化碳气体侵位年龄松辽盆地粉碎技术火山岩石英二氧化碳气藏同位素年龄

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A New Method for converting T_(2) Spectrum into Pore Radius

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Journal of Earth Science 2023年第4期34卷 966-974页

作者： Fan Zhang Zhenxue Jiang Yuanhao Zhang Bin Hu Zaiquan Yang Yuhua Yang Xianglu Tang Hanmin Xiao Lin Zhu Yunhao Han CNOOC Energy Economics Institute Beijing 100013China State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China Unconventional Oil and Gas Science and Technology Institute Beijing 102249China PetroChina Changqing oilfield company Xi􀆳an 710018China E&D Research Institute of oilfield company ltd. Daqing 163412China Research Institute of Petroleum Exploration and development Beijing 100083China

In this paper,a new method for converting the T_(2)(relaxation time) of NMR(nuclear magnetic resonance) into the pore radius is *** with NMR and centrifugation experiments,the relationship between pore radius and T_(2) of the sample was *** results show that the new method is more reasonable than the traditional *** the sample was denser and the mercury saturation was lower,the pore distribution curve was obtained by traditional method had a worse agreement with mercury injection experiment,while pore distribution curve of the new method had a better agreement with the mercury injection curve,which reflected the greater advantage of the new method as the reservoir becomes *** new method can obtain all the pore information in the *** results show that the pores in tight sandstone are mainly consisted with mesopore and macropore,and the connectivity of macropore is better than that of *** new method can effectively characterize the full pore distribution and the seepage characteristics in different pores interval of tight reservoirs,which had a great significance to evaluate the recoverable resources of tight reservoir.

关键词： tight reservoir nuclear magnetic resonance(NMR) pore radius T_(2)spectrum.

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Exploration technology and development trend of daqing oilfield

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Engineering Sciences 2012年第2期10卷 66-70,83页

作者： Feng Zhiqiang Jin Chengzhi Liang Jiangping Zhao Bo PetroChina daqing oilfield company Daqing Heilongjiang 163453 China

Exploration for oil and deep gas in northern Songliao Basin,complex rift basin—Hailaer Basin,and Yi-Shu Graben in peripheral basin has technical *** on supporting technology including seismic acquisition,processing and interpretation,logging and drilling are performed to establish high resolution 3D seismic technology for lithologic reservoir,deep volcanic rock and complex rift basin,reservoir evaluation and stimulation technology for low permeability reservoir,volcanic reservoir and complex rift reservoir,and drilling technology for deep volcanic rock,providing technical support for reserves increase in northern Songliao Basin,large gas reservoirs discovery in deep volcanic rock and exploration progress in complex rift ***-step development trend of exploration technology is proposed to meet the demand of more technical challenges in the future.

关键词： daqing oilfield exploration technology status development trend

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Shale oil enrichment evaluation and production law in Gulong Sag,Songliao Basin,NE China

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Petroleum Exploration and development 2023年第3期50卷 505-519页

作者： SUN Longde CUI Baowen ZHU Rukai WANG Rui FENG Zihui LI Binhui ZHANG Jingya GAO Bo WANG Qingzhen ZENG Huasen LIAO Yuanhui JIANG Hangl National Key Laboratory for Multi-resource collaborated Green development of contionental Shale Oil Daqing 163712China China National Petroleum corporation Beijing 100007China PetroChina daqing oilfield co. Ltd.Daqing 163712China PetroChina Research Institute of Petroleum Exploration&development Beijing 100083China

Based on the results of drilling,tests and simulation experiments,the shales of the Cretaceous Qingshankou Formation in the Gulong Sag of the Songliao Basin are discussed with respect to hydrocarbon generation evolution,shale oil occurrence,and pore/fracture evolution *** conjunction with a substantial amount of oil testing and production data,the Gulong shale oil enrichment layers are evaluated and the production behaviors and decline law are *** results are drawn in four ***,the Gulong shales are in the stage of extensive hydrocarbon expulsion when R_(0) is 1.0%-1.2%,with the peak hydrocarbon expulsion efficiency of 49.5%*** the low-medium maturity stage,shale oil migrates from kerogen to rocks and organic pores/*** the medium-high maturity stage,shale oil transforms from adsorbed state to free ***,the clay mineral intergranular pores/fractures,dissolution pores,and organic pores make up the majority of the pore *** the transformation,clay minerals undergo significant intergranular pore/fracture development between the minerals such as illite and illite/smectite mixed layer.A network of pores/fractures is formed by organic matter ***,free hydrocarbon content,effective porosity,total porosity,and brittle mineral content are the core indicators for the evaluation of shale oil enrichment ***-I layers are defined as free hydrocarbon content equal or greater than 6.0 mg/g,effective porosity equal or greater than 3.5%,total porosity equal or greater than 8.0%,and brittle mineral content equal or greater than 50%.It is believed that the favourable oil layers are Q2-Q3 and ***,the horizontal wells in the core area of the light oil zone exhibit a high cumulative production in the first year,and present a hyperbolic production decline pattern,with the decline index of 0.85-0.95,the first-year decline rate of 14.5%-26.5%,and the single-well estimated ultimate recovery(EUR)gre

关键词： Songliao Basin Gulong shale oil Cretaceous Qingshankou Formation hydrocarbon generation and expulsion reservoir pore type pore/fracture formation mechanism enrichment layer evaluation production decline law

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Modular zonal fluid sampling and pressure testing technology for production well

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Petroleum Exploration and development 2022年第2期49卷 438-447页

作者： XU Jianguo YANG Qinghai YI Peng HOU Ze JIA Weite FU Tao ZHANG Zonglin YUE Qingfeng Jilin oilfield Oil&Gas Engineering Research Institute Songyuan 138000China PetroChina Research Institute of Petroleum Exploration&development Beijing 100083China Jilin oilfield Xinmu Production Plant Songyuan 138000China daqing oilfield Production Engineering Research Institute Daqing 163453China

To accurately obtain development dynamic data such as zonal pressure and fluid parameters of each oil layer in the late development stage of a high water-cut old oilfield, a modular zonal sampling and testing technology with the characteristics of modularization, full electronic control and rapidity was proposed and developed. Lab testing and on-site testing was carried out. The modular zonal sampling and testing system is composed of 10 functional modules, namely ground control system, downhole power supply module, drainage pump, electronically controlled anchor, electronically controlled packer, electronically controlled sampler, magnetic positioning sub, terminal sub, adapter cable, and quick connector. Indoor tests have confirmed that the performance parameters of each module meet the design requirements. The downhole function modules of the system can withstand pressures up to 35 MPa and temperatures up to 85 ℃. The rubber cylinder of the electronically controlled packer can withstand a pressure difference of more than 10 MPa. The electronically controlled anchor has an anchoring force of greater than 6.9 t, and can be forcibly detached in the event of an accident. The discharge pump has a displacement of 0.8 m;/d and a head of 500 m. The electronically controlled sampler can meet the requirement of taking 500 mL of sample in each of the 3 chambers. Field tests in Jilin oilfield show that the system can realize rapid isolation and self-check of isolation of a certain production interval downhole, as well as layer-by layer pressure build-up test. The drainage pump can be used to discharge the mixed liquid between the upper and lower packers and near the wellbore to obtain real fluid samples of the tested formation interval. The data obtained give us better understanding on the pay zones in old oilfields, and provide important basis for development plan adjustment, reservoir stimulation, and EOR measures.

关键词： zonal sampling zonal testing modularization full electronic control rapidity enhanced oil recovery fluid sampling pressure testing

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The Characteristics of Putaohua Reservoir and development Strategies in Xujiaweizi Baxin oilfield

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Global Geology 2002年第1期7卷 89-95页

作者： GUO Qingxia(Exploration and development Research Institute of daqing oilfield, Heilongjiang 163453, P. R.China)YANG Haibo( The Advanced Personnel Training Center of daqing oilfield, Heilongjiang 163453, P,R, China) Exploration and development Research Institute of daqing oilfield Heilongjiang163453 P.R. China The Advanced Personnel Training Center of daqing oilfield Heilongjiang163453 PR China

With the using of new full 3 - D interpretative technology, the carefully interpretation of the micro - amplitude structures and faults by the reprocessed 3 -D seismic data in IES (Interactive Exploration System) interpretative system of Sun workstation is obtained. Because of the application of the well - advanced predictive technique for reservoir lithological changes, the predictive accuracy rate of drilling for 31 wells drilled in 1996 achieved 100 % and the economic and social benefits are desirable.

关键词： Full 3 - D, Micro - amplitude structure, Strategy

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Cenozoic Vertical-Axis Rotations of the Hoh Xil Basin, Central–Northern Tibet

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Acta Geologica Sinica(English Edition) 2016年第3期90卷 858-869页

作者： RAN Bo ZHAO Xixi LIU Zhifei WANG Chengshan ZHU Lidong JIN Wei LI Yalin State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China State Key Laboratory of Marine Geology Tongji UniversityShanghai 200092China Department of Earth and Planetary Sciences University of CaliforniaSanta CruzCA 95064USA State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesBeijing 100083China Exploration and development Research Institute of daqing oilfield company ltd. Daqing 163712China

Understanding the Cenozoic vertical-axis rotation in the Tibetan Plateau is crucial for continental dynamic evolution. Paleomagnetic and rock magnetic investigations were carried out for the Oligocene and Miocene continental rocks of the Hoh Xii basin in order to better understand the tectonic rotations of central Tibet. The study area was located in the Tongtianhe area located in the southern part of the Hoh Xil basin and northern margin of the Tanggula thrust system in central-northern Tibet. A total of 160 independently oriented paleomagnetic samples were drilled from the Tongtianhe section for this study. The magnetic properties of magnetite and hematite have been recognized by measurements of magnetic susceptibility vs. temperature curves and unbiocking temperatures. The mean directions of the Oligocene Yaxicuo Group in stratigraphic coordinates （Declination/Inclination = 354.9°/29.3°, k = 33.0, a9s = 13.5°, N =5 Sites） and of the Miocene Wudaoliang Group in stratigraphic coordinates （Declination/Inclination = 3.60/36.4°, k = 161.0, a9s = 9.7°, N =3 Sites） pass reversal tests, indicating the primary nature of the characteristic magnetizations. Our results suggested that the sampled areas in the Tuotuohe depression of the Hoh Xil basin have undergone no paleomagnetically detectable rotations under single thrusting from the Tanggula thrust system. Our findings, together with constraints from other tectonic characteristics reported by previous paleomagnetic studies, suggest tectonic rotations in the Cuoredejia and Wudaoliang depressions of the Hoh Xil basin were affected by strike-slip faulting of the Fenghuo Shan-Nangqian thrust systems. A closer examination of geological data and different vertical-axis rotation magnitudes suggest the tectonic history of the Hoh Xil basin may be controlled by thrust and strike-slip faulting since the Eocene.

关键词： Tibetan Plateau Hoh XU basin Vertical-axis rotation Cenozoic

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