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Control of Facies and Potential on Jurassic Hydrocarbon Accumulation and Prediction of Favorable Targets in the Hinterland Region of the Junggar Basin

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Acta Geologica Sinica(English Edition) 2010年第5期84卷 1256-1272页

作者： CHEN Dongxia PANG Xiongqi KUANG Jun KANG Dejiang LEI Lei DENG Yougen State Key Laboratory of Oil ＆ Gas Resource and Prospecting China University of Petroleum （Beijing） Beijing 102249 China CNPC xinjiang oilfield Company Karamay Xinjiang 834000 China

Exploration practices show that the Jurassic System in the hinterland region of the Junggar Basin has a low degree of exploration but huge potential, however the oil/gas accumulation rule is very complicated, and it is difficult to predict hydrocarbon-bearing properties. The research indicates that the oil and gas is controlled by structure facies belt and sedimentary system distribution macroscopically, and hydrocarbon-bearing properties of sand bodies are controlled by lithofacies and petrophysical facies microscopically. Controlled by ancient and current tectonic frameworks, most of the discovered oil and gas are distributed in the delta front sedimentary system of a palaeo-tectonic belt and an ancient slope belt. Subaqueous branch channels and estuary dams mainly with medium and fine sandstone are the main reservoirs and oil production layers, and sand bodies of high porosity and high permeability have good hydrocarbon-bearing properties; the facies controlling effect shows a reservoir controlling geologic model of relatively high porosity and permeability. The hydrocarbon distribution is also controlled by relatively low potential energy at the high points of local structure macroscopically, while most of the successful wells are distributed at the high points of local structure, and the hydrocarbon-bearing property is good at the place of relatively low potential energy; the hydrocarbon distribution is in close connection with faults, and the reservoirs near the fault in the region of relatively low pressure have good oil and gas shows; the distribution of lithologic reservoirs at the depression slope is controlled by the distribution of sand bodies at positions of relatively high porosity and permeability. The formation of the reservoir of the Jurassic in the Junggar Basin shows characteristics of favorable facies and low-potential coupling control, and among the currenffy discovered reservoirs and industrial hydrocarbon production wells, more than 90% are de

关键词： Jurassic facies control effect fluid potential prediction of hydrocarbon-bearing property,hinterland region Junggar basin,

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Characteristics and Main Controlling Factors of Tight Oil Reservoir in the Jimsar Sag of Junggar Basin

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Acta Geologica Sinica(English Edition) 2015年第A1期89卷 182-183页

作者： BAO Haijuan HE Wenjun FEI Liying JIA Xiyu ZHENG Menglin YANG Haibo GGUO Xuguang Petroleum Exploration and Development Institute Xinjiang Oilfield Company

1 Introduction Jimsar sag covers about 1278 km2 in the south of the eastern uplift of Junggar basin. It is a half graben depression area in which the west, south and north is controlled by faults （Fig. 1）, and is tilting uplift to the east. It deposited Permian, Triassic, Jurassic, the Cretaceous and Cenozoic strata chronologically. The thickness of Lucaogou Formation is about 200 m to 350 m, it is the source rocks in the area, and is also a typical self- generating and self-preserving tight oil reservoir trapped strata.

关键词： PETROLEUM reserves BASINS (Geology) POROSITY RESERVOIRS BIOACCUMULATION CHINA

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A Method of Evaluating the Effectiveness of a Hydraulic Oscillator in Horizontal Wells

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Sound & Vibration 2023年第1期57卷 15-27页

作者： Zhen Zhong Yadong Li Yuxuan Zhao Pengfei Ju Research Institute of Engineering Technology PetroChina Xinjiang Oilfield CompanyKaramayChina

Bent-housing motor is the most widely used directional drilling tool,but it often encounters the problem of high friction when sliding drilling in horizontal *** this paper,a mathematical model is proposed to simulate slide drilling with a friction reduction tool of axial vibration.A term called dynamic effective tractoring force(DETF)is defined and used to evaluate friction reduction *** factors influencing the DETF are studied,and the tool placement optimization problem is *** studyfinds that the drilling rate of penetration(ROP)can lower the DETF but does not change the trend of the DETF *** effectively work,the shock tool stiffness must be greater than some critical *** the case study,the best oscillating frequency is within 15∼20 *** reflection of the vibration at the bit boundary can intensify or weaken the friction reduction effec-tiveness,depending on the distance between the hydraulic oscillator and the *** optimal placement position corresponds to the plateau stage of the DETF *** reliability of the method is verified by thefield *** proposed method can provide a design and use guide to hydraulic oscillators and improve friction reduction effectiveness in horizontal wells.

关键词： Hydraulic oscillator axial vibration friction reduction dynamic effective tractoring force placement optimization

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Genesis and microscopic characteristics of tight reservoirs in the Fengcheng Formation, at the southern margin of the Mahu Sag

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能源地球科学(英文) 2023年第3期4卷 127-138页

作者： Luning Bai Wenbiao Huang Jun Qin Zongbin Zhang Zhongchen Ba Zhenhua Bai Yibing Guo Heng Li School of Geosciences China University of Petroleum(East China)QingdaoShandong266580China Research Institute of Exploration and Development PetroChina Xinjiang Oilfield CompanyKaramayXinjiang834000China Research Institute of Exploration and Development PetroChina Daqing Oilfield CompanyDaqingHeilongjiang163712China

The tight reservoirs of the Fengcheng Formation at the southern margin of the Mahu Sag have strong heterogeneity due to the diversity in their pore types, sizes, and structures. The microscopic characteristics of tight reservoirs and the mechanisms that generate them are of significance in identifying the distribution of high-quality reservoirs and in improving the prediction accuracy of sweet spots in tight oil reservoirs. In this paper, high-pressure mercury intrusion (HPMI) and nuclear magnetic resonance (NMR) experiments were carried out on samples from the tight reservoirs in the study area. These experimental results were combined with cluster analysis, fractal theory, and microscopic observations to qualitatively and quantitatively evaluate pore types, sizes, and structures. A classification scheme was established that divides the reservoir into four types, based on the microstructure characteristics of samples, and the genetic mechanisms that aided the development of reservoir microstructure were analyzed. The results show that the lower limit for the tight reservoir in the Fengcheng Formation is Φ of 3.5% and K of 0.03 mD. The pore throat size and distribution span gradually decrease from Type I, through Type II and Type III reservoirs to non-reservoirs, and the pore type also evolves from dominantly intergranular pores to intercrystalline pores. The structural trend shows a decrease in the ball-stick pore-throat system and an increase in the branch-like pore-throat system. The dual effects of sedimentation and diagenesis shape the microscopic characteristics of pores and throats. The sorting, roundness, and particle size of the original sediments determine the original physical properties of the reservoir. The diagenetic environment of ‘two alkalinity stages and one acidity stage’ influenced the evolution of pore type and size. Although the cementation of authigenic minerals in the early alkaline environment adversely affected reservoir properties, it also

关键词： Tight reservoir Pore-thr 0at structure Reservoir classification Diagenesis Fengcheng Formation Mahu Sag

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Large-scale Tazhong Ordovician Reef-flat Oil-Gas Field in the Tarim Basin of China

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Acta Geologica Sinica(English Edition) 2009年第1期83卷 179-188页

作者： ZHOU Xinyuan WANG Zhaoming YANG Haijun ZHANG Lijuan HAN Jianfa WANG Zhenyu Tarim oilfield Company Korla Xinjiang 841000 China South West Petroleum University Chengdu Sichuan 610500 China

The Tazhong reef-fiat oil-gas field is the first large-scale Ordovician organic reef type oil-gas field found in China. Its organic reefs were developed in the early Late Ordovician Lianglitag Formation, and are the first large reefs of the coral-stromatoporoid hermatypic community found in China. The organic reefs and platform-margin grain banks constitute a reef-flat complex, mainly consisting of biolithites and grainstones. The biolithites can be classified into the framestone, baffiestone, bindstone etc. The main body of the complex lies around the wells from Tazhong-24 to Tazhong-82, trending northwest, with the thickness from 100 to 300 m, length about 220 km and width 5-10 km. It is a reef-flat lithologic hydrocarbon reservoir, with a very complex hydrocarbon distribution： being a gas condensate reservoir as a whole with local oil reservoirs. The hydrocarbon distribution is controlled by the reef complex, generally located in the upper 100-200 m part of the complex, and largely in a banded shape along the complex. On the profile, the reservoir shows a stratified feature, with an altitude difference of almost 2200 m from southeast to northwest. The petroleum accumulation is controlled by karst reservoir beds and the northeast strike-slip fault belt. The total geologic reserves had reached 297.667 Mt by 2007.

关键词： Lianglitag Formation Ordovician organic reef oil-gas field reef-fiat complex Tarim

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A review of carbonates as hydrocarbon source rocks: basic geochemistry and oil–gas generation

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Petroleum Science 2019年第4期16卷 713-728页

作者： Liu-Wen Xia Jian Cao Ming Wang Ju-Lei Mi Ting-Ting Wang MOE Key Laboratory of Surficial Geochemistry School of Earth Sciences and EngineeringNanjing UniversityNanjing 210023JiangsuChina Research Institute of Experiment and Testing PetroChina Xinjiang Oilfield CompanyKaramay 834000XinjiangChina

Carbonates have been known to act as hydrocarbon source rocks, but their basic geochemical and associated hydrocarbon generation characteristics remain not well understood as they occur with argillaceous source rocks in most cases, and the hydrocarbon generation from each rock type is di cult to distinguish, forming one of puzzling issues within the field of petroleum geology and geochemistry. To improve the understanding of this critical issue, this paper reviews recent advances in this field and provides a summary of key areas that can be studied in future. Results show that carbonate source rocks are generally associated with high-salinity environments with low amounts of terrestrial inputs and low dissolved oxygen contents. Petrographically, these source rocks are dark gray or black, fine-grained, stratified, and contain bacterial and algal bioprecursors along with some other impurities. They generally have low organic matter contents, although these can vary significantly in di erent cases(e.g., the total organic carbon contents of marine and lacustrine carbonate source rocks in China are generally 0.1%–1.0% and 0.4%–4.0%, respectively). These rocks contain type I and type II kerogen, meaning there is a lack of vitrinites. This means that assessment of the maturity of the organic matter in these sediments needs to use non-traditional techniques rather than vitrinite reflectance. In terms of molecular geochemistry, carbonate source rocks have typical characteristics indicative of generally reducing and saline environments and lower organism-dominated bioprecursors of organic matter, e.g., high contents of sulfur compounds, low Pr/Ph ratios, and dominance of n-alkanes. Most of the carbonate source rocks are typically dominated by D-type organic facies in an oxidized shallow water mass, although high-quality source rocks generally contain A-and B-type organic facies in saline lacustrine and marine-reducing environments, respectively. The hydrocarbon generation mod

关键词： Saline lacustrine source rocks Carbonates Organic facies Hydrocarbon generation

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Residual oil evolution based on displacement characteristic curve

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International Journal of Mining Science and Technology 2020年第3期30卷 337-343页

作者： Duanchuan Lyu Chengyan Lin Lihua Ren Chunmei Dong Jinpeng Song School of Geosciences China University of Petroleum(East China)QingdaoShandong 266580China Exploration Department of Tarim oilfield Company PetroChinaKorlaXinjiang 841000China

The purpose of this study was to determine the displacement and dynamic distribution characteristics of the remaining oil in the two development stages of water flooding and subsequent alkaline surfactant polymer(ASP) flooding. The well pattern types in the water and ASP flooding stages are a longdistance determinant well pattern and short-distance five-point well pattern, respectively. The type A displacement characteristic curve can be obtained using the production data, and the slope of the straight-line section of the curve can reflect the displacement strength of the oil displacement agent. A numerical simulation was carried out based on the geological model. The results revealed that the injected water advances steadily with a large-distance determinant water-flooding well pattern. The single-well water production rate increases monotonically during water flooding. There is a significant positive correlation between the cumulative water-oil ratio and the formation parameter. Differential seepage between the oil and water phases is the main factor causing residual oil formation after water flooding, while the residual oil is still relatively concentrated. The effect of the chemical oildisplacement agent on improving the oil-water two-phase seepage flow has distinct stages during ASP flooding. The remaining oil production is extremely sporadic after ASP flooding.

关键词： Water flooding ASP flooding Water-drive characteristic curve Residue oil Thick oil layer

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Synthesis and Solution Properties of Comb-like Acrylamide Copolymers

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Journal of Wuhan University of Technology(Materials Science) 2012年第6期27卷 1105-1109页

作者：罗霄 BAI Lei ZA Kejian LI Dongwen HAN Wei PU Xiaolin School of Petroleum Engineering Southwest Petroleum UniversityChengdu 610500China Research Institute of Petroleum Exploration and Development Xinjiang Oilfield CompanyPetroChinaKaramay 834000China Tarim oilfield Company Korla 841000China

A comb-like acrylamide copolymer （HCJ-1） was synthesized by using aqueous free radical polymerization of acrylamide （AM） as main monomer and ether carboxylate as functional monomer. The copolymers were characterized with FT-IR and SEM. The SEM results show that the molecular structure of copolymer is extended in salt water. It is proved that the copolymer shows good salt *** solution properties of HCJ-1 were studied and compared with those of partially hydrolyzed polyacrylamide （HPAM）. The experimental results show that the obtained HCJ-1, compared with HPAM, exhibits a dramatic enhancement in the salt-resistant properties. The apparent viscosity retention rate of 1.5 g/L HCJ-1 aqueous solution and salt solution after 180 days at 60 ℃ are 70.6% and 64.5%, respectively, exhibiting good thermal stability. In addition, HCJ-1 solution also displays the excellent shearing resistance. In a word, the experimental results show the HCJ-1 is a promising profiling agent for high salinity reservoir.

关键词： comb-like salt resistance thermal stability sheafing resistance

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Fundamental study and utilization on supercritical CO_(2) fracturing developing unconventional resources:Current status,challenge and future perspectives

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Petroleum Science 2022年第6期19卷 2757-2780页

作者： Bing Yang Hai-Zhu Wang Gen-Sheng Li Bin Wang Liang Chang Gang-Hua Tian Cheng-Ming Zhao Yong Zheng State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China Craft Hawkins Department of Petroleum Engineering Louisiana State UniversityBaton RougeLAUSA Development Company of xinjiang oilfield Karamay834000XinjiangChina

Under the fact that considerable explo ration and production of unconventional re sources and wo rsening global climate,reducing carbon emission and rationally utilizing carbon resources have been drawn increasing *** CO_(2)(SC-CO_(2)) has been proposed as anhydrous fracturing fluid to develop unconventional reservoirs,since its advantages of reducing water consumption,reservoir contamination *** understanding of SC-CO_(2)fracturing mechanism and key influencing factors will exert significant impact on the application of this technology in the *** this paper,the fundamental studies on SC-CO_(2)fracturing from the aspects of laboratory experiment and simulation are *** fracturing experimental setups,fracture monitoring and characterizing methods,unconventional formation categories,numerical simulation approaches,fracturing mechanism and field application etc.,are *** fundamental study results indicate that compared with conventional hydraulic fracturing,SC-CO_(2)fracturing can reduce fracture initiation pressure and easily induce complex fracture networks with multiple *** field test further verifies the application prospect and the possibility of carbon ***,due to the limitation of reservoir complexity and attributes of SC-CO_(2),massive challenges will be encountered in SC-CO_(2)*** to the current research status,the limitations in basic research and field application are summarized,and the future development direction of this technology and relevant suggestions are proposed.

关键词： Unconventional resources Supercritical CO_(2)fracturing Experiment and numerical simulation Fracture initiation and propagation

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Analyzing crude oils from the Junggar Basin(NW China) using comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry(GC×GC-TOFMS)

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Acta Geochimica 2017年第1期36卷 66-73页

作者： Yuce Wang Wanyun Ma Ni Zhou Jiangling Ren Jian Cao State Key Laboratory for Mineral Deposits Research Department of Earth SciencesNanjing University Research Institute of Experiment and Testing PetroChina Xinjiang Oilfield Company

As a new technology of analyzing crude oils, comprehensive two-dimensional gas chromatography cou- pled with time-of-flight mass spectrometry （GCxGC- TOFMS） has received much research attention. Here we present a case study in the Junggar Basin of NW China. Results show that the hydrocarbons, including saturates and aromatics, were all well-separated without large co- elution, which cannot be realized by conventional one-dimensional GC-MS. The GC×GC technique is especially effective for analyzing aromatics and low-to-middle- molecular-weight hydrocarbons, such as diamondoids. The geochemical characteristics of crude oils in the study area were investigated through geochemical parameters extracted by GC×GC-TOFMS, improving upon the understanding obtained by GC-MS. Thus, the work here represents a new successful application of GC×GC- TOFMS, showing its broad usefulness in petroleum geochemistry.

关键词： Comprehensive two dimensional gas chromatography coupled with time of flight mass spectrometry (GCxGC TOFMS) Petroleum geochemistry Biomarkers Diamondoid Junggar Basin

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