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Architecture of Sandstone Bodies of Paleogene Shahejie Formation in Northern qikou sag, Northeast China

Journal of Earth Science 2017年第6期28卷 1078-1085页

作者： Hua Wang Si Chen Chuanyan Huang Xianbin Shi Yuantao Liao Faculty of Earth Resources China University of Geosciences Wuhan 430074 China Key Laboratory of Tectonics and Petroleum Resources Ministry of Education China University of Geosciences Wuhan 430074 China Hubei Geological Survey Institute Wuhan 430034 China

The conception of special geologic bodies has been applied in this study to define and illustrate economic oil and gas reservoirs in sandbodies, which is helpful for hydrocarbon forecast and exploration. Using the comprehensive analysis of drilling, logging, seismic, seismic attribute extraction, and logging constrained inversion in 3D data volume, the special geologic bodies of the Shahejie Formation（Ps^1s） in northern qikou sag, which have good hydrocarbon potential, are identified and described under the constraint of sequence stratigraphic framework. The dimensions, geometry, and spatial distribution features of the special geologic bodies, as well as their inner architectures and sequence-structure patterns, are also ascertained. The geologic bodies evolved from relative centralization in the middle part of the lacustrine basin in the early stage of Ps1~s Formation, to several dispersive isolated parts in the later stage. This shows a small cycle interval（~2.5 Ma） at the end of the whole transgressive depositional process of Ps1（~7.5 Ma） during the expansion of the lake and relative lake level rise, with the control of sediments supply and fault-related subsidence, which effect the evolution of the sedimentary system. According to the relevance and regularity of the geologic bodies＇ development, different types of potential profitable reservoir traps, including the lithologic lenticular traps, lithologic updip pinchout traps, and structural-lithologic composite traps, can be preserved in the study area. In addition, the internal architecture models provide scientific basis for further hydrocarbon exploration in the frontier basin without enough data.

关键词： qikou sag Qibei sub-sag Shahejie Formation special geologic bodies

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Recognition and depiction of special geologic bodies of Member 3 of Dongying Formation in Littoral Slope Zone,qikou sag

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Journal of Central South University 2011年第3期18卷 898-908页

作者：陈思王华周立宏黄传炎任培罡王家豪廖远涛向雪梅夏存银 Key Laboratory of Tectonics and Petroleum Resources Ministry of EducationChina University of Geosciences Faculty of Earth Resources China University of Geosciences PetroChina Dagang Oilfield Company Department of Geology and Logging Jiangsu Petroleum Exploration Bureau Sinopec Geophysical Research Institute PetroChina Fushan Oilfield Company

The purpose of this study is to forecast the profitable oil and gas reservoir,which is the key of finding hydrocarbon,based on the conception of special geologic *** the guiding methodology of the research thinking of integration of point-line-surface by using the methods and techniques of logging,seismic,seismic attribute,and logging constrained inversion in 3D data volume,the special geologic bodies of Member 3 of Dongying Formation in Littoral Slope Zone of qikou sag,which has important hydrocarbon exploration potential,are recognized and described under the constraint of sequence stratigraphic *** a result,the developed scale,geometric shape and space distribution feature of the special geologic bodies are forecasted;the inner structure and sequence structure patterns of the geologic bodies are also *** the lowstand system tract (LST) and lacustrine expanding system tract (EST) to the highstand system tract (HST),the geologic bodies have evolved from relative centralization of lake basin reducing period to three relative dispersive isolated parts of broad lake basin *** to the relevance and regularity of the development of geologic bodies,the conclusions can be obtained that three types of potential profitable reservoir traps,including the lithologic lens traps,lithologic updip pinchout traps and structural-lithologic composite traps,are *** addition,scientific basis for further hydrocarbon exploration in new area (few-well area and no-well area) is offered in the guidance of sequence stratigraphic model.

关键词： qikou sag Littoral Slope Zone Dongying Formation special geologic bodies

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Sequence Thickness and its Response to Episodic Tectonic Evolution in Paleogene qikou sag, Bohaiwan Basin

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Acta Geologica Sinica(English Edition) 2012年第5期86卷 1077-1092页

作者： CHEN Si WANG Hua ZHOU Lihong HUANG Chuanyan WANG Jiahao REN Peigang XIANG Xuemei Key Laboratory of Tectonics and Petroleum Resources China University of GeosciencesMinistry of EducationWuhan 430074China Faculty of Earth Resources China University of GeosciencesWuhan 4300747China PetroChina Dagang Oilfield Company Tianjin 300287China Department of Geology&Logging Jiangsu Petroleum Exploration BureauYangzhou 225000China China Petrochemical Nanjing Petroleum and Geophysical Institute Nanjing 2100147China

The sequence stratigraphy framework of Paleogene of qikou sag has been built in this paper. The evolution law of episodic subsidence in qikou sag has been expounded, with the analysis of the characteristic of sequence thickness, as well as the study of consedimental tectonic activity, subsidence history, paleogeomorphology and the coupling relationship among them. The faults controlling action was the dominant mechanism during rifting stage I , as the depression was the dominant mechanism during rifting stage III, which embodies a process from intense disparity fault depression to integral subsidence. Meanwhile, under the control of regional faulting and later stage depression, subsidence rate centers and paleogeomorphic concave centers are always corresponding to the sequence thickness centers, and the changes of subsidence centers and paleogeomorphology concave centers are consistent with the migration of thickness centers, which presents the restriction, coupling and response among them and clarifies the law that tectonic activity controls the basin fill by means of controlling the subsidence rate and paleogeomorphology from contributing factor angle. On this basis, the dynamic evolution of the composite pattern of structure-subsidence-deposition in the fault controlling actic region during the three rifting stages and their petroleum geological significance has been discussed.

关键词： sequence thickness episodic tectonic evolution response relationship Paleogene qikou sag

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Main Controlling Factors and Dominant Reservoir Series Analysis of Es_3 in the Qibei Area of qikou sag

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Acta Geologica Sinica(English Edition) 2013年第1期87卷 219-231页

作者： PU Xiugang HAN Wenzhong HUA Shuangjun ZHANG Wei CHEN Changwei Research Department of Fundamental Geology Exploration and Development Research InstituteDagang Oilfield

Based on analysis of geophysical data such as core observation, rock slices identification, physical property, scanning electron microscope, X-ray diffraction, logging data etc., 16 factors of sedimentation, diagenesis, fluid pressure, and their relationships with reservoir physical property were analyzed, and the results indicate sedimentation is the internal factor controlling the reservoir property, diagenesis is the external and final decisive factor and abnormal fluid pressure is an important factor preserving the deep reservoir property. Quantitative characterization of diagenesis indicates that compaction and dissolution are more important than cementation and they respectively cause porosity change of-23.6% and 7.7% and -6.2%. Through optimizing 11 main controlling factors and constructing reservoir evaluation index （REI） according to the hierarchical cluster and principal component analysis, reservoir classification standard was established and reservoirs were divided into four classes. The studies show that Es~ SQ4 consists mainly of class I and II, while Es~ SQ6 is mainly of class III and II; the favorable zone is the north and south slope of Qibei sub-sag and the Liujianfang fault-nose. The successful application of the quantitative and comprehensive evaluation in the Qibei area verifies the advanced, practicable method of less artificial factor is suitable for the low porosity and permeability reservoir.

关键词： single factor analysis quantitative characterization comprehensive and quantitativereservoir evaluation Shahejie Formation Qibei area qikou sag

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Cenozoic Fault Distribution Characteristics and Evolution in qikou sag of Bohai Basin, China

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Journal of Earth Science 2014年第4期25卷 701-712页

作者： Dongdong Zhang Chiyang Liu Yijian Huang Siqian Chen Yi Lu Zhipan Zhang State Key Laboratory of Continental Dynamics Institute of Oil and Gas Basin Northwest University Research Institute of Exploration & Development Dagang Oilfield Company Petro China

qikou sag, located in north-center of Huanghua depression in Bohai Basin, is a Cenozoic sag with rich hydrocarbon. As a microcosm of Bohai Basin, the fault characteristics of Cenozoic structural layers in qikou sag could indicate and record the evolution of Cenozoic stress field in Bohai Basin. Based on the latest 3-D seismic data, the study takes statistics on the fault system of Cenozoic structural layers and analyzes the fault throws of major large faults along the strikes in different periods in qikou sag, then the fault distribution regularities and the fault direction characteristics in each structural layer are summarized. The result shows that during Cenozoic, the fault activity strength migrates from southwest to northeast and the strikes of faults changes from northwestward in Sha-3 period to nearly east-westward since Sha-1 period.

关键词： Bohai Basin qikou sag fault statistics tectonic migration.

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Paleogeomorphy,provenance system and sedimentary system of the Dongying formation in the qikou sag

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Mining Science and Technology 2009年第6期19卷 800-806页

作者： WANG Hua HUANG Chuan-yan ZHAO Shu-e YAN De-tian BAI Yun-feng XIANG Xue-mei CHEN Si XIA Cun-yin LIAO Ji-hua Faculty of Earth Resources China University of Geosciences Wuhan Hubei 430074 China Daqing Research Institute of Petroleum Exploration and Development Daqing Heilongfiang 163453 China

Reconstructed synsedimentary paleogeomorpholgy is an effective method in predicting the distribution of sandbodies and can provide valid evidence in the search for reservoirs. Based on a synsedimentary paleogeomorpholgy reconstruction of the third member of the Dongying formation (Ed3) in the qikou sag,the basic paleogeomorphic characteristics of Ed3 are described and the spatial distributions of denudation and subsidence areas are discussed. Key boundary faults controlling the deposition of important sediment bodies are proposed and the interrelations among faulted slope-break belts or flexure belts,intra-depression uplifts and sags,sediment sources and sediments input points have been investigated.

关键词： paleogeomorphology provenance system sedimentary system Dongying formation qikou sag

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Characteristics and origin of high-quality lacustrine carbonate reservoirs in the gentle slope area of the qikou sag, Bohai Bay Basin

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Petroleum Research 2016年第1期1卷 103-112页

作者： Youxing Yang Zhenkui Jin Baishui Gao Oil&Gas Survey China Geological SurveyBeijing 100029China College of Geosciences China University of PetroleumBeijing 102249China

Lacustrine carbonate reservoirs in the gentle slope(ramp)area of qikou sag are highly *** researches about characteristics and distribution of these high quality reservoirs are *** this study,an integrated investigation was conducted on the high-quality lacustrine carbonate reservoirs in the ramp area of qikou sag based on data of thin section examination,lithological log response,testing results,and mercury-injection capillary pressure *** the study area,grainstone reservoirs in the lower 1st member of the Shahejie Formation are high-quality reservoirs characterized by high-medium porosity,moderate permeability,low displacement pressure,and relative large pore ***,these reservoirs are mainly composed of bioclastic and oolitic sparite,and reservoir storage space consists of secondary intergranular dissolved pores and *** conditions generally control distribution of these reservoirs,as limestone grains filled intergranularly with sparry calcite cement are usually formed under strong hydrodynamic *** calcite cemented limestone is subject to late dissolution with abundant soluble substances,which is one of the direct causes for the well developed secondary dissolved *** bank and bioclastic bank are under high-energy hydrodynamic conditions with the best reservoir petrophysical *** of beach bars are usually in an intermittently-turbulent highly-hydrodynamic environment with medium reservoir petrophysical *** bays and supratidal zones are under low-energy tranquil hydrodynamic conditions,with poor reservoir petrophysical *** late diagenesis,large quantities of organic acid and slightly acidic water were released from surrounding shale and migrated along the top unconformity of the 3rd member of the Shahejie Formation,resulting in development of numerous secondary dissolved pores in carbonate reservoirs,which is the main cause of high-quality re

关键词： lacustrine carbonate reservoir space pore structure diagenetic mechanism hydrocarbon filling qikou sag

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Large Gravity Flow Deposits in the Member 1 of Paleogene Shahejie Formation, qikou sag, Bohai Bay Basin

Large Gravity Flow Deposits in the Member 1 of Paleogene Sha...

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第十五届全国古地理学及沉积学学术会议

作者： Si Chen Hua Wang Chuanyan Huang Tianhao Gong Key Laboratory of Tectonics and Petroleum Resources MOEChina University of Geosciences

The large scale gravity flow deposits（up to 1700 km2） that developed in the Member 1 of Shahejie Formation（Paleogene） in the Binhai slope area in the qikou sag shows the sedimentary characters of multiple sediment sources, long distance and multi-fault transport, and preservation along the transfer path during the sedimentary processes. This study focus on the gravity flow deposits in the oil-rich qikou sag in Bohai Bay Basin. Under the sequence stratigraphy framework, the source-transport path-sink processes has been discussed. The aim of this study is to（1） illuminate the formation of the multiple sources, the configuration relationship between different sources, and the origin of continuous sediment supply.（2） analyze the controlling and evolution of the paleogeomorphology（fault-controlling steep slope and multi-step fault slope）, sediment transport, the sedimentary develop mechanism in processes.（3） focus on the distributions, sedimentary patterns and space evolution of the large scale multi-stages gravity flow deposits.（4） discuss the formation mechanism and controlling factors of the gravity flow in qikou sag. The conclusions include:（1） the gravity flow was controlled by multiple sources. During the Member 1 of Shahejie Formation, the Binhai slope was supplied by sources from four different areas that include: Dashentang source from northern Yanshan Mountain, Chadian sources, Gegu and Xiaozhan sources from western Cangxian Uplift. The continuous sediment supply allows the large scale gravity flow to be formed in the lacustrine basin.（2） the paleogeomorphology of the Member 1 of Shahejie Formation in the qikou sag is the complex of fault-controlling steep slope and multi-step fault slope. The fault-controlling steep slope is developed in the northern part of Binhai Slope, as the multi-step fault slope is mainly developed in the orientation of west to east in the west part of Binhai Slope. The fault zones play a role as the transport paths for the sediments and

关键词： qikou sag Gravity flow deposits multiple overlap layers thin alternating beds high quality reservoir

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Reservoirs properties of slump-type sub-lacustrine fans and their main control factors in first member of Paleogene Shahejie Formation in Binhai area, Bohai Bay Basin, China

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Petroleum Exploration and Development 2020年第5期47卷 977-989页

作者： PU Xiugang ZHAO Xianzheng WANG Jiahao WU Jiapeng HAN Wenzhong WANG Hua SHI Zhannan JIANG Wenya ZHANG Wei Dagang Oilfield Company PetroChinaTianjin 300280China Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education China University of GeosciencesWuhan 430074China

High-yielding oil wells were recently found in the first member of Paleogene Shahejie Formation,the Binhai area of qikou sag,providing an example of medium-and deep-buried high-quality reservoirs in the central part of a faulted lacustrine *** using data of cores,cast thin sections,scanning electron microscope and physical property tests,the sedimentary facies,physical properties and main control factors of the high-quality reservoirs were *** reservoirs are identified as deposits of slump-type sub-lacustrine fans,which are marked by muddy fragments,slump deformation structure and Bouma sequences in *** present mostly medium porosity and low permeability,and slightly medium porosity and high *** have primary intergranular pores,intergranular and intragranular dissolution pores in feldspar and detritus grains,and structural microcracks as storage *** main factors controlling the high quality reservoirs are as follows:(1)Favorable sedimentary microfacies of main and proximal distributary gravity flow *** microfacies with coarse sediment were dominated by transportation and deposition of sandy debris flow,and the effect of deposition on reservoir properties decreases with the increase of depth.(2)Medium texture *** is shown by medium-sorted sandstones that were formed by beach bar sediment collapsing and redepositing,and was good for the formation of the primary intergranular pores.(3)High content of intermediate-acid volcanic rock *** reservoir sandstone has high content of detritus of various components,especially intermediate-acid volcanic rock detritus,which is good for the formation of dissolution pores.(4)Organic acid *** was attributed to hydrocarbon maturity during mesodiagenetic A substage.(5)Early-forming and long lasting overpressure.A large-scale overpressure compartment was caused by under-compaction and hydrocarbon generation pressurization related to thick deep-lacustrine mu

关键词： faulted lacustrine basin slump-type sub-lacustrine fan reservoir Paleogene Shahejie Formation porosity-permeability structure qikou sag Bohai Bay Basin

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