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Development Model and Quantitative Prediction of Igneous Rock in S Oilfield, the bohai Sea Area

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Journal of Geoscience and Environment Protection 2023年第5期11卷 174-185页

作者： Xijie Wang Jianmin Zhang Youchun Lai Shicong Lyu Jiaqi Liu bohai Oilfield Research Institute Tianjin Branch of CNOOC Ltd. Tianjin China

The structure of S Oilfield of bohai sea area in China is located in the low uplift slope zone of the Dongwa Laibei area in the Huanghekou depression. The target interval of the oilfield belongs to the Paleogene layered structural oil reservoir under the influence of igneous rocks. Due to the widespread development of igneous rocks, and the diversity of igneous rock types, the structure is complex, and the lateral changes are intense. The differences in volcanic eruption intensity and volcanic materials made the igneous rock masses overlap each other, with rapid changes in lithofacies, and complex seismic reflection structures. Therefore, it was difficult to carry out fine characterization of igneous rocks. Based on the lithofacies model, lithofacies combination types, and seismic response characteristics of volcanic mechanisms, this paper summarized three types of development models of volcanic mechanisms in the study area. At the same time, through technical means such as stratigraphic slicing, seismic attribute extraction, and attribute optimization analysis, the spatial distribution characteristics of various facies zones of igneous rocks at different stages were described in detail, achieving precise prediction of igneous rocks in Bozhong S Oilfield. During the development process of the oilfield, the technical research results guided the optimization of well locations and provided technical support for the efficient development of the oilfield.

关键词： Igneous Rock Facies Model Volcanic Institutions Seismic Attribute

Nonlinear flow numerical simulation of low-permeability reservoir

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Journal of Central South University 2012年第7期19卷 1980-1987页

作者：于荣泽卞亚南周舒王楷军吕琦陈朝辉 PetroChina Research Institute of Petroleum Exploration&Development-Langfang Special Oil Development company of Liaohe Oilfield company Down-hole Service company of Xinjiang Oilfield company Geological Scientific Research Institute of Shengli Oilfield company cnooc Energy Technology&Service-Oilfield Engineering Research Institute

A nonlinear flow reservoir mathematical model was established based on the flow characteristic of low-permeability *** well-grid equations were deduced and the dimensionless permeability coefficient was introduced to describe the permeability variation of nonlinear *** nonlinear flow numerical simulation program was compiled based on black-oil model.A quarter of five-spot well unit was simulated to study the effect of nonlinear flow on the exploitation of low-permeability *** comprehensive comparison and analysis of the simulation results of Darcy flow,quasi-linear flow and nonlinear flow were *** dimensionless permeability coefficient distribution was gained to describe the nonlinear flow *** result shows that compared with the results of Darcy flow,when considering nonlinear flow,the oil production is low,and production decline is *** fluid flow in reservoir consumes more driving energy,which reduces the water flooding *** flow model overstates the reservoir flow capability,and quasi-linear flow model overstates the reservoir flow *** flow ability of the formation near the well and artificial fracture is strong while the flow ability of the formation far away from the main streamline is *** nonlinear flow area is much larger than that of quasi-linear flow during the fluid flow in low-permeability *** water propelling speed of nonlinear flow is greatly slower than that of Darcy flow in the vertical direction of artificial fracture,and the nonlinear flow should be taken into account in the well pattern arrangement of low-permeability reservoir.

关键词： low-permeability reservoir nonlinear flow mathematical model numerical simulation

Studies on the Inversion Phenomenon of Physical Properties Observed in the Huagang Formation Reservoir in the Xihu Sag Based on the Water-Rock Reaction Experiments

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Journal of Ocean University of China 2021年第4期20卷 755-764页

作者： HUANG Siqin XU Fanghao XU Guosheng CUI Hengyuan ZHANG Wu State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China cnooc(China)Co. Ltd.Shanghai CompanyShanghai 200030China

In the Xihu Sag,the reservoirs of the Paleogene Huagang formation have entered the middle diagenetic stage A and the rock physical properties of the water layer are considerably more suitable for the gas migration and storage than those of the present gas layer,indicating the inversion of the physical *** this study,core samples were collected from the corresponding reservoir to conduct water-rock reaction experiments in acidic,alkaline,and neutral systems under the specific temperature and *** reasons for the inversion of physical properties were investigated based on the experiment results in reservoir diagenetic *** inversion of physical properties can be attributed to the fact that the diagenetic environment around the gas-water interface controls the water-rock reaction *** different types of acidic substances,two different situations corresponding to inverted physical properties were analyzed along with the corresponding *** the pore fluid is acidic,the physical properties make the overall water layer a better reservoir space than the gas layer,which can be referred to as the overall inversion of physical *** the fluid were generally neutral or weakly alkaline and the gas layer was rich in CO2,only the physical properties of the water layer adjacent to the gas-water interface were more favorable for the gas migration than those of the gas *** phenomenon can be referred to as the near-interface inversion of physical properties.

关键词： Xihu Sag water-rock reaction reservoir evolution inverted physical properties diagenetic environment special phe-nomenon

Study on Optimization of Polymer Enhanced Foam Formulation System

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Engineering（科研） 2023年第11期15卷 742-748页

作者： Meinan Wang Yuejie Wang Hongyou Zhang Xiaoyan Yang Xiaoming Chen bohai Oilfield Research Institute of cnooc Ltd.—Tianjin Branch Tang Gu Tianjin China

Taking the pilot test area of polymer enhanced foam flooding in Y oilfield as the prototype, a numerical core model was established, and the polymer enhanced foam formulation system was optimized by analyzing the resistance factor and the change rule of oil recovery of different formulation systems. Research shows that the higher the polymer concentration, the greater the resistance factor, and the more obvious the sealing effect formed in the formation. The concentration of surfactant has a greater impact on the resistance factor. With the increase of surfactant concentration, the resistance factor increases significantly, and the plugging effect of foam agent on core is significantly enhanced. With the increase of gas-liquid ratio, the resistance factor first increases and then decreases. When the gas-liquid ratio is 1:1, the resistance is the largest, and the foam agent has the strongest plugging effect on the core. The optimal formula system of polymer enhanced foam flooding in Y oilfield is: polymer concentration is 1200 mg/L, surfactant concentration is 0.25 wt%, gas-liquid ratio is 1:1.

关键词： Enhanced Foam Polymer Concentration Surfactant Concentration Gas-Liquid Ratio

Trend judgment of abandoned channels and fine architecture characterization in meandering river reservoirs: A case study of Neogene Minhuazhen Formation NmⅢ2 layer in Shijiutuo bulge, Chengning uplift, bohai Bay Basin, East China

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Petroleum Exploration and Development 2019年第5期46卷 943-953页

作者： NIU Bo ZHAO Jiahong FU Ping LI Junjian BAO Zhidong HU Yong SU Jinchang GAO Xingjun ZHANG Chi YU Dengfei ZANG Dongsheng LI Min College of Geosciences China University of PetroleumBeijing 102249China Research Institute of Exploration and Development PetroChina Jilin Oilfield CompanySongyuan 138001China No.5 Oil Production Plant PetroChina Changqing Oilfield CompanyXi’an 710020China bohai Oilfield Research Institute CNOOC Tianjin CompanyTianjin 300452China PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China

Based on well logging responses,sedimentary patterns and sandstone thickness,the distribution characteristics of meandering river sedimentary sand body of Neogene Minghuazhen Formation NmⅢ2 layer in the west of Shijiutuo Bulge,Chengning Uplift,bohai Bay Basin were investigated.A new approach to calculate the occurrence of the sand-mudstone interfaces using resistivity log of horizontal well was advanced to solve the multiple solution problem of abandoned channel’s *** method uses the trigonometric function relationship between radius,dip and length of the resistivity log to calculate the occurrence qualitatively-quantitatively to help determine the true direction of the abandoned *** method can supplement and improve the architecture dissection technique for meandering river *** method was used to study the dip angle and scale of the lateral accretion layers in point bar quantitatively to help determine the spatial distribution of lateral accretion *** fine architecture model of underground meandering river reservoir in the study area has been *** from traditional grids,different grid densities for lateral accretion layers and bodies were used in this model by non-uniform upscaling to establish the inner architecture model of point-bars and realize industrial numerical simulation of the whole study *** research results can help us predict the distribution of remaining oil,tap remaining oil,and optimize the waterflooding in oilfields.

关键词： bohai Bay Basin meandering river horizontal well resistivity curve lateral accretion layers lateral accretion bodies architecture modeling remaining oil distribution

Research and Practice on the Profile Control Characteristics of Emulsions in bohai Oil Field

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Journal of Geoscience and Environment Protection 2018年第8期6卷 52-59页

作者： Dongdong Yang Meinan Wang Feifei Miao Shaopeng Wang Junting Zhang bohai Oilfield Research Institute of cnooc Ltd.-Tianjin Branch Tang Gu Tianjin China

In order to study the profile control characteristics of emulsions in porous medium, the heterogeneous experimental model was established, by which the experimental scheme was designed with different permeabilities, matching degree of particle size and concentration of emulsions. Based on experimental results of physical simulation, the concept of distributing rate and changing coefficient was introduced to quantitatively evaluate the profile control characteristics of emulsions. The results of the study show that, as the permeability ratio and emulsion concentration increase, the profile control characteristics of emulsions will enhance. The profile control characteristics of emulsions will be the best. The profile control scheme with emulsions was implemented in bohai X oil field, The research results can be used for reference to design the profile control scheme in bohai heterogeneous reservoir.

关键词： Emulsions Profile Control Characteristics Physical Simulation Heterogeneous Reservoir Practice

Dynamic Analysis on Rifting Stage of Pearl River Mouth Basin through Analogue Modeling

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Journal of Earth Science 2010年第4期21卷 439-454页

作者：孙珍周蒂孙龙涛陈长民庞雄姜建群樊浩 Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Department of Technology Shenzhen Branch of CNOOC Hainan Oil & Gas Exploration company Liaohe Oilfield of PetroChina

The Pearl River Mouth basin （PRMB） is a marginal sedimentary basin of the South China Sea. It trends NE and is divided into three segments from west to east by two NW-trending faults. Changing dramatically in structures along and across strike, the PRMB is a good example to analyze main factors that might control the process of a continental rift basin＇s extension. Through five series of analogue experiments, we investigate the role of different factors, such as pre-existing discontinuities of crust, rheological profiles of lithosphere, kinematics of extension and presence of magmatic bodies and strong crustal portions （rigid massifs） on the development of basin＇s structures. After being compared with the architecture of the natural prototype, the results of the analogue models were compared with the architecture of the natural prototype and used to infer the role of the different factors controlling the formation and evolution of the PRMB. The main conclusions are as follows. （1） Affected by pre-Cenozoic structures, the PRMB was controlled by crosscut NE- and NW-trending initial faults, and the NW-trending Yitong＇ansha （--~l~） fault may be a through-going fault along dip and offset the NE-trending rift and faults, while the Enpingdong （和统暗沙） fault might exist only in the middle and south. （2） The NW-trending faults may orient WNW to be sinistrally transtensional under SE to nearly NS extension. （3） The thickness ratio of brittle over ductile crust in Baiyun （白云） sag is lessthan normal, suggesting an initially hot and weak lithosphere. （4） The magma must have taken part in the rifting process from early stage, it may occur initially upon or slightly south of the divergent boundary in the middle segment. The flow of magma toward rift boundary faults caused extra vertical subsidence above the initial magma reservoir without creating a large extensional fault. （5） The rigid massif contributed to the strain partition along and across basin strike.

关键词： Pearl River Mouth basin analogue modeling controlling factor of continental rift basin.

China's Energy Sector Rises to Global Economic Challenge

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China Oil & Gas 2009年第1期16卷 21-23页

作者： Ma Qiang Sun Chengchun bohai Drilling Engineening company CNPC

The deepening financial crisis has put China's energy industry in a tougher situation:energy demand is dwindling,production is sagging,stockpiles are rising,and energy companies are competing to cut prices.

关键词：能源行业全球经济中国能源需求金融危机能源公司企业亏损经济复苏

Characteristics of the basement reformed volcanic edifice in bohai Sea and its implication for hydrocarbon enrichment

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Petroleum Research 2017年第4期2卷 336-346页

作者： Tao Ye Ajuan Wei Chunrong Zhu Yuechuan Wang Kunshun Gao Jinchang Zeng cnooc China Limited Tianjin BranchTianjin300452China

The intact volcanic edifice had been formed and finalized during the depositional stage of Mesozoic Yixian Formation in the bohai *** residual body of the intact volcanic edifice after reformation was defined as the basement reformed volcanic *** on drilling,seismic,well logging and microscopic data in the study area,characteristics of the basement reformed volcanic edifice were well discussed,and its control on oil and gas was also *** showed that the basement reformed volcanic edifice was jointly controlled by magmatic property,paleo-geomorphology and late reformation,and the late fault cutting and differential denudation were major reformation ways of the volcanic edifice;strong and weak volcanic eruption patterns developed in the study belonged to the invertedsequence eruption,and the explosive facies and the intermediate-acidic or acidic effusive facies were the favorable reservoir facies;weathering,cycles and period boundaries controlled vertical distribution of high-quality lithofacies,and coupling between each periodic interface at different levels and residual high-quality lithofacies was the key to oil and gas *** exploration targets of volcanic rocks were to find periodic interfaces in the volcanic edifice with the residual high-quality lithofacies within 150 m from the weathering crust or eruption surface.

关键词： The reformed volcanic edifice Eruptive facies Weathering crust High-quality reservoir Yixian formation bohai Sea