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Reservoir-forming conditions and key exploration & development techniques for Xushen gas field in Northeast China

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Petroleum research 2019年第2期4卷 125-147页

作者： Fenglan Wang Yongzhuo Wang Xuemin Zhou Changhai Yin Ping Shu Baojun Cao Yingkang Zhu exploration and development research institute Daqing Oilfield Co.Ltd.Daqing163712China

exploration and development of volcanic gas reservoirs is a world-class problem,and less experience can be learned at home and *** study of reservoir-forming conditions of Xushen gas field,four sets of hydrocarbon source rocks,mainly mudstone and coal seam of Shahezi Formation,are identified in this gas field;its cap rocks are mudstone in Member 2 of Denglouku Formation,and Member 1 and Member 2 of Quantou *** simulating reservoir-forming history,four filling periods of the Xushen gas field are determined,and the most favorable exploration targets are crater areas with structural highs,large thickness and good physical *** the basis of diagenetic mechanism study,the criteria of sequence series,lithology identification and reservoir types of gas reservoirs have been established;the volcanic rock bodies have been carefully depicted and the distribution laws of effective reservoirs of gas pools have been figured *** on evaluating reservoir-permeability characteristics of reservoirs,the gas well productivity characteristics(mainly type II,III and IV wells)have been identified,and the optimum design technology for volcanic gas reservoir development has been *** gas reservoirs in all blocks of Xushen gas field are classified into three types:singlebody gas reservoir model,disconnected multi-body gas reservoir model and interconnected multi-body gas reservoir *** technologies,including multi-layer fracturing of vertical well,staged fracturing of open-hole horizontal well and volume fracturing,have been *** to gas well production performance,pressure change,well-controlled reserves and spatial distribution of volcanic bodies,combined with numerical simulation and prediction of gas reservoirs,the evaluation method of residual potential of volcanic gas reservoirs has been *** technologies for effective exploration and development of complex volcanic gas reservoirs have been established and perf

关键词： Xushen gas field Reservoireforming conditions Volcanic rock development Productivity Optimum design

Distribution and genesis of the anomalously high porosity zones in the middle-shallow horizons of the northern Songliao Basin

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Petroleum Science 2010年第3期7卷 302-310页

作者： Meng Yuanlin Liang Hongwei Meng Fanjin Wu Heyong Wang Cheng Xiu Hongwen Zhang Anda Li Yaguang Guo Rixin School of Earth Science Northeast Petroleum University Daqing 163318 China exploration and development research institute Daqing Oilfield Company Ltd. Daqing 163712 China No. 1 Petroleum Production Subcompany Daqing Oilfield Company Ltd. Daqing 163113 China

High-quality reservoirs occur in the middle-shallow horizons of the northern Songliao Basin. The distribution and genesis of their anomalously high porosity zones were studied using measured porosities, examination of ordinary thin sections and blue epoxy resin-impregnated thin sections and by SEM. The results show that there are three anomalously high porosity zones at the depth of 450-900 m, 1,300-1,900 m, 2,050-2,350 m respectively, named zone i, zone ii and zone iii from top to bottom. Horizontally, zone i and zone ii are distributed all over the basin except in the Southeastern Uplift, while zone iii is only distributed in the Central Depression. Zone i was formed by meteoric water leaching as well as organic acid dissolution. Zones ii and iii were dominantly formed by organic acid dissolution. Additionally, clay mineral transformation generating H＋ and hydrocarbon emplacement retarding the cementation of sandstones are also important for the formation of zones ii and iii.

关键词： Anomalously high porosity zone diagenetic fluid organic acid diagenesis secondaryporosity hydrocarbon emplacement sedimentary facies Songliao Basin

SYNDIOSPECIFIC POLYMERIZATION OF STYRENE WITH Ar[O,O/NH]Cp ~*TiCl ACTIVATED WITH MMAO

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Chinese Journal of Polymer Science 2009年第5期27卷 659-665页

作者：陈劼 Haerbin institute of Technology Postdoctoral Station of School of Materials Science and Engineering daqing oilfield company ltd. Exploration and Development of Research Institute

A series of titanium complexes Ar[O,E]Cp~*TiCl(Cp~*=C_5Me_5,Ar=1,2-phenylene,E=NH(1a);Ar=1,2- phenylene,E=O(1b);Ar=2.2'-diphenylene,E=O(1c);Ar=2,2'-dinaphthalene,E=O(1d)) has been prepared by the reaction of corresponding phenol derivatives with Cp~*TiCl_3 in the presence of excessive *** the conditions of low Al/Ti molar ratio(e.g.500) and high reaction temperatures(>70℃),all the titanium complexes display higher catalytic activities towards the syndiospecific polymerization of styrene,in t...

关键词： Ziegler-Natta polymerization Catalysts Syndiotactic Polystyrene.

A Study of the Migration and Accumulation Efficiency and the Genesis of Hydrocarbon Natural Gas in the Xujiaweizi Fault Depression

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Acta Geologica Sinica(English Edition) 2008年第3期82卷 629-635页

作者： LI Jijun LU Shuangfang XUE Haitao HUO Qiuli XU Qingxia College of Earth Sciences Daqing Petroleum Institute Daqing Heilongjiang 163318 exploration and development research institute of the daqing oilfield company ltd. Daqing Heilongjiang 163712

In order to investigate the migration and accumulation efficiency of hydrocarbon natural gas in the Xujiaweizi fault depression, and to provide new evidence for the classification of its genesis, a source rock pyrolysis experiment in a closed system was designed and carried out. Based on this, kinetic models for describing gas generation from organic matter and carbon isotope fractionation during this process were established, calibrated and then extrapolated to geologic conditions by combining the thermal history data of the Xushen-1 Well. The results indicate that the coal measures in the Xujiaweizi fault depression are typical ＂high-efficiency gas sources＂, the natural gas generated from them has a high migration and accumulation efficiency, and consequently a large-scale natural gas accumulation occurred in the area. The highly/over matured coal measures in the Xujiaweizi fault depression generate coaliferous gas with a high δ^13C1 value （〉 -20‰） at the late stage, making the carbon isotope composition of organic alkane gases abnormally heavy. In addition, the mixing and dissipation through the caprock of natural gas can result in the negative carbon isotope sequence （δ^13C1 〉δ^13C2 〉δ^13C3 〉δ^13C4） of organic alkane gases, and the dissipation can also lead to the abnormally heavy carbon isotope composition of organic alkane gases. As for the discovery of inorganic nonhydrocarbon gas reservoirs, it can only serve as an accessorial evidence rather than a direct evidence that the hydrocarbon gas is inorganic. As a result, it needs stronger evidence to classify the hydrocarbon natural gas in the Xujiaweizi fault depression as inorganic gas.

关键词： Xujiaweizi fault depression hydrocarbon natural gas migration and accumulation efficiency genesis carbon isotope fractionation kinetics

Present geotemperature and its suggestion to natural gas generation in Xujiaweizi fault-depression of the northern Songliao Basin

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Science China Earth Sciences 2008年第S1期51卷 207-220页

作者： ZHOU QingHua 1,2 ,FENG ZiHui 3 &MEN GuangTian 3 1 research institute of Petroleum exploration and development,PetroChina,Beijing 100083,China 2 Geological Logging Subcompany of daqing Oil Field company ltd.,daqing 163411,China 3 research institute of Petroleum exploration and development of daqing Oil field company ltd.,daqing 163732,China research institute of Petroleum exploration and development PetroChina Beijing China Geological Logging Subcompany of daqing Oil Field company ltd. Daqing China research institute of Petroleum exploration and development of daqing Oil field company ltd. Daqing China

According to stastistic of present geotemperatures at the depths of 1000,2000,3000 and 4000 m,respectively in the Xujiaweizi fault-depression of the north Songliao Basin,the result indicates that Xujiaweizi fault-depression falls in the high geotemperature area,with the higher geothermal gradient in the depression layer than that in the fault-depression *** geothermal gradient decreases with the increasing of the *** thermal conductivity of rock greatly controls the geothermal *** main factors constraining the current geotemperature include thermal configuration of the earth's crust, deep faults,distribution and abundance of *** high geotemperature is in favour of generation of deep gas.

关键词： Xujiaweizi fault-depression geotemperature geothermal gradient thermal conductivity of rock deep layer natural gas

Depositional environment of terrestrial petroleum source rocks and geochemical indicators in the Songliao Basin

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Science China Earth Sciences 2011年第9期54卷 1304-1317页

作者： FENG ZiHui FANG Wei LI ZhenGuang WANG Xue HUO QiuLi HUANG ChunYan ZHANG JuHe ZENG HuaSen School of Earth and Space Sciences Peking University Beijing 100871 China exploration and development research institute Daqing Oilfield Company Ltd. Daqing 163712 China

To determine geochemical indicators for depositional environment favored by terrestrial petroleum source rocks, we selected 40 source rock samples from the Late Cretaceous Qingshankou Formation （Kzqn） and the first member of Nenjiang Formation （K2n1） in the Songliao Basin to qualify saturate fraction and aromatic fraction using GC-HRT （gas chromatography high resolution time-of-flight mass spectrometry） and quantify important biomarkers using GC-MS. The results reveal that source rocks from the 1st member of Qingshankou Formation （K2qn1） are characterized by not only high contents of terpanes, regular steranes and 4-methylsteranes but also high contents of dinosteranes, C31 steranes and aryl isoprenoids. Presence of specific biomarkers like elementary sulfur and lanostanes indicates a depositional environment of lagoon characterized by water stratification and high salinity. In the 2nd-3rd members of Qingshankou Formation （K2qn2＋3）, source rocks contain lower contents of biomarkers, indicating a depositional environment of shallow fresh-water lake delta. Source rocks in the K2n1 contain high contents of terpanes, regular steranes and 4-methylsteranes but lower contents of dinosteranes, C31 steranes and aryl isoprenoids, indicating a depositional environment of fresh-brackish open lake characterized by low salinity and poor water stratification, where organic matter is seriously altered by bacteria. Overall analysis shows that primary geochemical indicators for terrestrial petroleum source rocks are as follows： 1） C30 hopanes 〉 1500 ppm; 2） gammacerane 〉190 ppm; 3） C27 steranes 〉200 ppm; 4） 4-methylsteranes 〉 100 ppm; 5） aryl isoprenoids 〉 3 ppm; 6） dehydroxyl-vitamin E 〉 10 ppm.

关键词： Songliao Basin source rock depositional environment geochemistry biomarker

Characteristics of remaining oil viscosity in water-and polymer-flooding reservoirs in daqing oilfield

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Science China Earth Sciences 2010年第12期53卷 72-83页

作者： XU ZhengShun,ZHANG JuHe,FENG ZiHui,FANG Wei & WANG FengLan exploration and development research institute,daqing oilfield company ltd.,daqing 163712,China exploration and development research institute Daqing Oilfield Company Ltd. Daqing China

The experimental analysis of 21 crude oil samples shows a good correlation between high molecular-weight hydrocarbon components (C 40+) and ***-four remaining oil samples extracted from oil sands of oilfield development coring wells were analyzed by high-temperature gas chromatography (HTGC),for the relative abundance of C 21-,C 21-C 40 and C 40+ *** relationship between viscosity of crude oil and C 40+ (%) hydrocarbons abundance is used to expect the viscosity of remaining *** mobility characteristics of remaining oil,the properties of remaining oil,and the next displacement methods in reservoirs either water-flooded or polymer-flooded are studied with rock permeability,oil saturation of coring wells,*** experimental results show that the hydrocarbons composition,viscosity,and mobility of remaining oil from both polymer-flooding and water-flooding reservoirs are heterogeneous,especially the *** abundance of C 21- and C 21-C 40 hydrocarbons in polymer-flooding reservoirs is lower than that of water-flooding,but with more abundance of C 40+ *** is then suggested that polymer flooding must have driven more C 40- hydrocarbons out of reservoir,which resulted in relatively enriched C 40+,more viscous oils,and poorer *** oil in water-flooding reservoirs is dominated by moderate viscosity oil with some low viscosity oil,while polymer-flooding mainly contained moderate viscosity oil with some high viscosity *** each oilfield and reservoir,displacement methods of remaining oil,viscosity,and concentration by polymer-solution can be adjusted by current viscosity of remaining oil and mobility ratio in a favorable range.A new basis and methods are suggested for the further development and enhanced oil recovery of remaining oil.

关键词： remaining oil viscosity mobility ratio water-flooding polymer-flooding heterogeneity polymer-solution viscosity

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Architecture of volcanic sequence and its structural control of Yingcheng Formation in Songliao Basin

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Journal of Central South University 2014年第5期21卷 2026-2040页

作者：程日辉王腾飞沈艳杰任延广 College of Earth Sciences Jilin University research institute of exploration and development Daqing Oilfield Limited Company

Yingcheng Formation is a set of volcanic strata composed of lava rocks,volcanic clastic rocks and sedimentary rocks,filled in some fault depressions in Songliao Basin,early *** study about litho-facies succession of Yingcheng Formation in the outcropped area of the southeast margin and in Xujiaweizi fault depression and its distribution based on analysis of seismic data,shows that the sequence of volcanic strata is quite different from the clastic sedimentary *** study the architecture of volcanic sequence and its structural control of Yingcheng Formation in Songliao Basin,in this work,dividing of the volcanic sequence and dating of the sequence boundaries were finished firstly,then displacement and displacement rate of faults were *** results show that,sample ages of top of the first member,the seconde member,and the third member are 127 Ma,115 Ma,110.7 Ma,respectively and sample age of the bottom of the third member is 114.7 *** maximum displacement and displacement rate of the fault 1 are 3 km and 300 m/Ma,respectively,and those of the fault 2 are 3 km and 1000 m/*** suggest that,the cooling unit of lava rock or pyroclastic rock is a basic genetic stratigraphic unit in volcanic sequence *** units can construct a parasequence reflecting a volcanic eruption stage.A sequence was superimposed by some parasequences,responding to a volcanic active *** are three types of volcanic sequences in Yingcheng Formation: type of explosion,type of effusion and type of mixed *** surface of the volcanic sequence,an unconformity surface widely spread and traced in seismic profiles,is a base for analysis of volcanic *** development of volcanic sequence was controlled by faulting,and the curves of fault displacement(rate)can reflect this *** preservation of volcanic sequence was controlled by the type of volcanic structure and the regional subsidence,also different from that of the se

关键词： volcanic sequence stratigraphy Yingcheng Formation cooling unit structural subsidence

Controlling factors for oil production in continental shales:A case study of Cretaceous Qingshankou Formation in Songliao Basin

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Petroleum research 2023年第2期8卷 183-191页

作者： Bo Zhou Yuxiang Xiao Zhengdong Lei Rui Wang Shuiqing Hu Xiulin Hou PetroChina research institute of Petroleum exploration&development Beijing100083China exploration and development research institute of daqing oilfield Co. Ltd.Daqing163712China

Continental shale oil is widely distributed in the Cretaceous Qingshankou Formation of the Songliao Basin in Northeast *** the Qijia-Gulong sag and the Changling sag in the Songliao Basin,breakthroughs of shale oil exploration and development have been made in the first and second members of the Qingshankou Formation,and several wells represented byWell GYYP1 have achieved high and stable shale oil ***,some horizontal wells in shale oil development pilot test(Well groups A and D)were characterized by low shale oil production,high flowback rate and rapid production ***,controlling factors of the shale oil production were *** results show that shale oil enrichment area and optimal sweet spots are fundamental for high shale oil production,improving horizontal length and drilling ratio of sweet spots is a technical guarantee for enhancing shale oil production of single well,and artificial fracture network(***,complexity,and coupling with preexisting geological bodies)created by fracturing is a direct factor for controlling the shale oil *** subsequent exploration and development of the shale oil,the heterogeneity of sweet spot distribution should be carefully considered,the shale oil enrichment areas and optimal sweet spots also need be optimized,and the wellbore trajectory control and fine geological modeling techniques should be figured ***,the fracturing techniques suitable for the shale with high clay mineral content and weak brittleness should be developed,and the personalized and differentiated staged fracturing also needs to be performed,to effectively enhance single-well shale oil production and estimated ultimate recovery.

关键词： Continental shale Shale oil production Heterogeneity Drilling ratio of sweet spot Fracture network Qingshankou formation Songliao Basin