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Petroleum Research 2018年第3期3卷 283-287页

作者： Ying-Ying Sun Shan-Yan Zhang Zhao-Peng Yang Guo-Qiang Sang Tong Li Yang-Cheng Li State Key Laboratory of EOR Beijing100083China Research institute of Petroleum exploration and development Beijing100083China Engineering and Geological Technology Team of daqing Oilfield Underground Operation Branch Company Daqing163000China

Geological reserves of oil-water transition zone(OWTZ)in low-permeability reservoirs have been considered as uneconomical resources because of high water cut and low *** the OWTZ may account for 30%-50%of a reservoir,it has not been paid more attentions *** average oil saturation of the OWTZ is about 35%,which is equal to that of a reservoir after water ***,CO_(2) flooding is an effective technique for residual oil recovery after water flooding,which could reduce the residual oil saturation ***,it is of significance for the EOR of the low-permeability reservoir if the CO_(2) flooding could be successfully applied in the *** this study,a method based on a long core to simulate distribution of oil saturation in OWTZs is set up in the laboratory using bidirectional *** order to investigate CO_(2) flooding characteristics in OWTZs,experiments are carried out on 3 sets of initial oil saturation,and the recoverable reserves of the OWTZ and its contribution to the EOR are calculated based on the WJ reservoir in the Jilin Oilfield,China.

关键词： Oil-water transition zone Initial oil saturation CO_(2)flooding Laboratory simulation CT scanning

Gulong shale oil enrichment mechanism and orderly distribution of conventional–unconventional oils in the Cretaceous Qingshankou Formation,Songliao Basin,NE China

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Petroleum exploration and development 2023年第5期50卷 1045-1059页

作者： ZHANG Shuichang ZHANG Bin WANG Xiaomei FENG Zihui HE Kun WANG Huajian FU Xiuli LIU Yuke YANG Chunlong PetroChina Research institute of Petroleum exploration&development Beijing 100083China CNPC Key Laboratory of Petroleum Geochemistry Beijing 100083China National Key Laboratory for Multi-resource Collaborated Green development of Continental Shale Oil Daqing 163712China PetroChina daqing Oilfield Co. Ltd.Daqing 163712China

Through the study of organic matter enrichment,hydrocarbon generation and accumulation process of black shale of the Cretaceous Qingshankou Formation in the Songliao Basin,the enrichment mechanism of Gulong shale oil and the distribution of conventional–unconventional oil are *** Songliao Basin is a huge interior lake basin formed in the Early Cretaceous under the control of the subduction and retreat of the western Pacific plate and the massive horizontal displacement of the Tanlu Fault Zone in Northeast *** the deposition of the Qingshankou Formation,strong terrestrial hydrological cycle led to the lake level rise of the ancient Songliao Basin and the input of a large amount of nutrients,resulting in planktonic bacteria and algae *** seawater intrusion events promoted the formation of salinization stratification and anoxic environment in the lake,which were beneficial to the enrichment of organic *** analysis confirms that the biogenic organic matter of planktonic bacteria and algae modified by microorganisms plays an important role in the formation of high-quality source rocks with high oil generation *** are four favorable conditions for the enrichment of light shale oil in the Qingshankou Formation of the Gulong Sag,Songliao Basin:the moderate organic matter abundance and high oil potential provide sufficient material basis for oil enrichment;high degree of thermal evolution makes shale oil have high GOR and good mobility;low hydrocarbon expulsion efficiency leads to a high content of retained hydrocarbons in the source rock;and the confinement effect of intra-layer cement in the high maturity stage induces the efficient accumulation of light shale *** restoration of hydrocarbon accumulation process suggests that liquid hydrocarbons generated in the early(low–medium maturity)stage of the Qingshankou Formation source rocks accumulated in placanticline and slope after long-distance secondary migr

关键词： Songliao Basin Cretaceous Qingshankou Formation Gulong shale oil organic carbon storage orderly distribution of conventional-unconventional oil fault sealing whole petroleum system shale oil enrichment

Characteristics of breccia lava reservoirs and analysis of their dominant factors: case study of the Xushen gas field located in the Songliao Basin

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Mining Science and Technology 2010年第1期20卷 109-114页

作者： WANG Zhiqiang LIU Chengzhi WANG Wenguang TIAN Zhao LI Minghui SUN Wei College of Resources and Information China University of Petroleum Beijing 102249 China School of Earth Sciences Daqing Petroleum Institute Daqing 163318 China Hulunbei'er Branch Company Daqing Oilfield Co. Ltd. Hailaer 021008 China daqing Yushulin Oilfield development Co. Ltd. Daqing 163453 China Drilling Technology Service Company No. 1 Daqing Drilling & Exploration Engineering Corporation Daqing 163000 China

Breccia lava is a type of rock in transition between volcanic clastic rock and lava. Its physical properties are compara-tively special, while the nature of its genesis and the formation of reservoirs, deposits and concentrations vary considerably. In order to discover the different genesis for breccia lava reservoirs, our study has been carried out on breccia lava for its rock constituents, structures, diagenesis and reconstruction from tectonic movements to mineral depositions. From our analysis, we conclude that the main type of reservoir is a secondary emposieu, where rock compositions, structures, diagenesis and tectonic action are the major contributing factors to the deposition of breccia lava and its properties. Diagenesis constrained the extent of conservation of the primary pore of breccia lava and produced secondary porosity. The roles of tectonics were played out through the formation controlling tectonic fissures inside breccia lava and affected the impermeability of breccia lava fluids. The constituents of lava rock determine directly the type of diagenesis and its response to tectonic action. At the time of appropriate rock composition and structures, constructive formation occurred to breccia lava. Breccia lava also responded proactively to tectonic movements, forming the best quality collective reservoir agglomerations of vast spaces and strong permeability.

关键词： breccia lava diagenesis volcanic rock reservoir

The Application of Data & Graphic Managing Technology in Oil & Gas exploration

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Global Geology 2002年第2期7卷 199-203页

作者： Guo Zhiyong Chen Weijun Ma Xuehui The exploration Department of daqing Oilfield Company Daqing163453China The Exploration & Development Research Institute of Daqing OilfieldDaqing163453China The Exploration & Development Research Institute of Daqing OilfieldDaqing163453China

The managing of information and data between researching groups is critical to the success of any exploration or development project. Poor communication and data sharing between technological departments can result in incomplete interpretations or inaccurate drilling decisions making. According to the statistic results, the time cost in retrieving and collecting data will occupy more than 70 % percent of the total working time of technicians during the petroleum geological researching. This paper is a summary of the characteristics and the development of the Data & Graphic management system for oil & gas *** that the system's application in oil & gas exploration and researching, which has improved the quality and accurateness of mapping has been summarized in detail. The application of the system mentioned above has proved to be very successful in daqing oilfield.

关键词： Graphic library,Management system,Well design,Reserves research

CURRENT COLLOIDAL DISPERSION GELS ARE NOT SUPERIOR TO POLYMER FLOODING

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大庆石油地质与开发 2006年第5期25卷 71-80页

作者： Seright Randy Han Peihui Wang Dongmei . New Mexico Tech USA exploration and development Research institute of daqing Oil Field Company Ltd. PetroChina

The suggestion that the colloidal-dispersion-gel (CDG) process is superior to normal polymer flooding is misleading and generally incorrect. Colloidal dispersion gels, in their present state of technological development, should not be advocated as an improvement to, or substitute for, polymer flooding. Gels made from aluminum-citrate crosslinked polyacrylamides can act as conventional gels and provide effective conformance improvement in treating some types of excess water production problems if sound scientific and engineering principles are respected.

关键词： Colloidal-dispersion-gel(CDG) Polymer flooding Controversy

Crude-oil hydrocarbon composition characteristics and oil viscosity prediction in the northern Songliao Basin

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Science China Earth Sciences 2014年第6期57卷 297-312页

作者： ZHANG JuHe FENG ZiHui FANG Wei HUO QiuLi ZHANG Kun LI JingKun ZENG HuaSen ZHANG BoWei exploration and development Research institute Daqing Oilfield Company Ltd. School of Resources and Environment Southwest Petroleum University

Crude oil hydrocarbon composition characteristics and oil viscosity prediction are important bases in petroleum exploration. A total of 54 oil/heavy-oil samples and 17 oil sands were analyzed and quantified using both comprehensive 2D gas chromatog raphy （GCxGC） and comprehensive 2D gas chromatography/time-of-flight mass spectrometry （GCxGC/TOFMS）. The results show that crude oil in the West slope is mainly heavy oil and its hydrocarbon composition is characterized overall by paraf fins 〉 mono-aromatics 〉 naphthenes 〉 non-hydrocarbons 〉 di-aromatics 〉 tri-aromatics 〉 tetra-aromatics. Aromatics are most abundant and non-hydrocarbons are least abundant, whilst content differences among paraffins, naphthenes, aromatics, and non-hydrocarbons are less than 15%. There are two types of heavy oil, secondary type and mixing type. Biodegradation is the main formation mechanism of heavy oil. Biodegradation levels cover light biodegradation, moderate biodegradation, and se- vere biodegradation. With increasing biodegradation, paraffin content decreases while contents of aromatics and non- hydrocarbons increase. In contrast, naphthene content increases first and then decreases with increasing biodegradation. In se- vere biodegradation stage, naphthenes decrease more quickly than aromatics and non-hydrocarbons. This provides a new method for studying oil/heavy-oil biodegradation mechanism and biodegradation resistance of different hydrocarbons at dif- ferent biodegradation stages. In the Longhupao-Daan terrace and Qijia-Gulong depression, most crude oil is conventional oil. Its composition is dominated by paraffins with the lowest content of aromatics. In some casual oil wells from the Long- hupao-Daan terrace, crude oil from Saertu oil reservoirs is moderately biodegraded whereas crude oil from Putaohua oil reser voir is lightly biodegraded. Chemical parameters using saturate hydrocarbons and aromatics are usually not suitable for deter mining organic type and thermal maturity o

关键词： Songliao Basin crude-oil and heavy oil hydrocarbon composition comprehensive two-dimensional gas chromatog-raphy

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Effective source rock selection and oil–source correlation in the Western Slope of the northern Songliao Basin,China

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Petroleum Science 2021年第2期18卷 398-415页

作者： He Bi Peng Li Yun Jiang Jing-Jing Fan Xiao-Yue Chen Research institute of Petroleum exploration and development PetroChinaBeijing100083China Petroleum exploration and Production Research institute SINOPECBeijing100083China China National Oil and Gas exploration and development Co.Ltd. Beijing100034China

This study considers the Upper Cretaceous Qingshankou Formation,Yaojia Formation,and the first member of the Nenjiang Formation in the Western Slope of the northern Songliao *** mudstone with high abundances of organic matter of Gulong and Qijia sags are considered to be significant source rocks in the study *** evaluate their development characteristics,differences and effectiveness,geochemical parameters are ***-dimensional basin modeling and hydrocarbon evolution are also applied to discuss the effectiveness of source *** the biomarker characteristics,the source–source,oil–oil,and oil–source correlations are assessed and the sources of crude oils in different rock units are *** on the results,Gulong and Qijia source rocks have different organic matter primarily detrived from mixed sources and plankton,*** source rock has higher thermal evolution degree than Qijia source *** biomarker parameters of the source rocks are compared with 31 crude oil *** studied crude oils can be divided into two *** oil–source correlations show that group I oils from Qing II–III,Yao I,and Yao II–III members were probably derived from Gulong source rock and that only group II oils from Nen I member were derived from Qijia source rock.

关键词： Songliao basin Western slope Source rock distinction Crude oils Biomarker Oil-source correlation

Formation mechanism of in-situ volcanic reservoirs in eastern China:A case study from Xushen gasfield in Songliao Basin

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Science China Earth Sciences 2014年第10期57卷 2998-3014页

作者： FENG ZiHui YIN ChangHai LIU JiaJun ZHU YingKang LU JiaMin LI JiangHai exploration and development Research institute Daqing Oilfield Company Ltd. School of Earth and Space Science Peking University

A large number of in-situ volcanic reservoirs have been discovered from the Meso-Cenozoic rift basin group in eastern *** on drilling results in combination with geological and geophysical analysis,a case study from the Early Cretaceous Xujiaweizi fault-depression shows that the formation mechanism of in-situ volcanic reservoirs is characterized by"fault-controlled body,body-controlled facies,facies-controlled reservoir,and reservoir-controlled accumulation".In other words,deep faults control the volcanic eruption type,volcanic body,and gas reservoir distribution;the volcanic body determines the spatial distribution of volcanic facies and volcanic gas reservoir size;the volcanic facies control reservoir physical properties and effective thickness of gas formation;the volcanic reservoir properties control gas reservoir type and gas *** result is useful to guiding the discovery of in-situ volcanic gas reservoirs in faulted basins in both theory and practice.

关键词： Songliao Basin in-situ volcanic reservoir volcanic eruption type volcanic facies belt volcanic eruption cycle

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Heterogeneous geological conditions and differential enrichment of medium and high maturity continental shale oil in China

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Petroleum exploration and development 2022年第2期49卷 257-271页

作者： HU Suyun BAI Bin TAO Shizhen BIAN Congsheng ZHANG Tianshu CHEN Yanyan LIANG Xiaowei WANG Lan ZHU Rukai JIA Jinhua PAN Zhejun LI Siyang LIU Yuxi Research institute of Petroleum exploration&development PetroChinaBeijing 100083China Longdong Shale Oil development Department of PetroChina Changqing Oilfield Qingyang 745100China Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient development Northeast Petroleum UniversityDaqing 163318China

Based on the comparison of basic geological conditions and enrichment characteristics of shale oil plays, the heterogeneity of source and reservoir conditions and differential enrichment of medium-high maturity continental shale oil plays in China have been confirmed.(1) Compared with the homogeneous geological settings and wide distribution of marine shale oil strata in North America, the continental medium and high maturity shale oil plays in China are significantly different in geological conditions generally;continental multi-cyclic tectonic evolution forms multiple types of lake basins in multi-stages, providing sites for large-scale development of continental shale oil, and giving rise to large scale high-quality source rocks, multiple types of reservoirs, and diverse source-reservoir combinations with significant heterogeneity.(2) The differences in sedimentary water environments lead to the heterogeneity in lithology, lithofacies, and organic material types of source rocks;the differences in material source supply and sedimentary facies belt result in reservoirs of different lithologies, including argillaceous and transition rocks, and tight siltstone, and complex source-reservoir combination types.(3) The heterogeneity of the source rock controls the differentiation of hydrocarbon generation and expulsion, the diverse reservoir types make reservoir performance different and the source-reservoir configurations complex, and these two factors ultimately make the shale oil enrichment patterns different. Among them, the hydrocarbon generation and expulsion capacity of high-quality source rocks affect the degree of shale oil enrichment. Freshwater hydrocarbon source rocks with TOC larger than 2.5% and saline hydrocarbon source rocks with TOC of 2% to 10% have a high content of retained hydrocarbons and are favorable.(4) High-abundance organic shale is the basis for the enrichment of shale oil inside the source. In addition to being retained in shale, liquid hydro

关键词： continental shale oil medium to high maturity geological characteristics heterogeneity enrichment pattern Junggar Basin Songliao Basin Ordos Basin Santanghu Basin

Influencing factors and prevention measures of casing deformation in deep shale gas wells in Luzhou block,southern Sichuan Basin,SW China

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石油勘探与开发:英文版 2023年第4期50卷 979-988页

作者： HAN Lingling LI Xizhe LIU Zhaoyi DUAN Guifu WAN Yujin GUO Xiaolong GUO Wei CUI Yue University of Chinese Academy of Sciences Beijing 100049China PetroChina Research institute of Petroleum exploration&development Beijing 100083China Northeast Petroleum University Daqing 163318China

Based on structural distribution and fault characteristics of the Luzhou block,southern Sichuan Basin,as well as microseismic,well logging and in-situ stress data,the casing deformation behaviors of deep shale gas wells are summarized,and the casing deformation mechanism and influencing factors are ***,the risk assessment chart of casing deformation is plotted,and the measures for preventing and controlling casing deformation are ***-activated fault slip is a main factor causing the casing deformation in deep shale gas wells in the Luzhou *** the working area,the approximate fracture angle is primarily 10°-50°,accounting for 65.34%,and the critical pore pressure increment for fault-activation is 6.05-9.71 *** casing deformation caused by geological factors can be prevented/controlled by avoiding the faults at risk and deploying wells in areas with low value of stress *** casing deformation caused by engineering factors can be prevented/controlled by:(1)keeping wells avoid faults with risks of activation and slippage,or deploying wells in areas far from the faulting center if such avoidance is impossible;(2)optimizing the wellbore parameters,for example,adjusting the wellbore orientation to reduce the shear force on casing to a certain extent and thus mitigate the casing deformation;(3)optimizing the casing program to ensure that the curvature radius of the curved section of horizontal well is greater than 200 m while the drilling rate of high-quality reservoirs is not impaired;(4)optimizing the fracturing parameters,for example,increasing the evasive distance,lowering the single-operation pressure,and increasing the stage length,which can help effectively reduce the risk of casing deformation.

关键词： Sichuan Basin Luzhou block shale gas well casing deformation mechanism fault activation risk assessment prevention measure