Lacustrine shale oil resource potential of Es 3 L Sub-Member of Bonan Sag, Bohai Bay Basin, Eastern China

2017 ◽  
Vol 28 (6) ◽  
pp. 996-1005 ◽  
Author(s):  
Shuangfang Lu ◽  
Wei Liu ◽  
Min Wang ◽  
Linye Zhang ◽  
Zhentao Wang ◽  
...  
Keyword(s):  
Eastern China ◽  
Bohai Bay ◽  
Shale Oil ◽  
Bohai Bay Basin ◽  
Resource Potential ◽  
Bonan Sag ◽  
Lacustrine Shale

Lacustrine Shale Deposition and Variable Tectonic Accommodation in the Rift Basins of the Bohai Bay Basin in Eastern China

2015 ◽  
Vol 26 (5) ◽  
pp. 700-711 ◽  
Author(s):  
Chuanyan Huang ◽  
Jinchuan Zhang ◽  
Hua Wang ◽  
Shu Jiang
Keyword(s):  
Eastern China ◽  
Bohai Bay ◽  
Rift Basins ◽  
Bohai Bay Basin ◽  
Lacustrine Shale

Water–Rock Interactions and Origin of Formation Water in a Continental Rift Lacustrine Basin: A Case Study of the Cenozoic Formation in Bonan Sag, Bohai Bay Basin

2021 ◽  
pp. 1-65
Author(s):  
Tianxia An ◽  
Bingsong Yu ◽  
Yongshi Wang ◽  
Zhuang Ruan ◽  
Wei Meng ◽  
...  
Keyword(s):  
Lake Water ◽  
Eastern China ◽  
Atmospheric Precipitation ◽  
Bohai Bay ◽  
Type I ◽  
Formation Water ◽  
Bohai Bay Basin ◽  
Type Iii ◽  
Different Types ◽  
Bonan Sag

The faulted lacustrine Bohai Basin in eastern China contains abundant hydrocarbon resources. In these reservoirs, understanding the sandstone diagenesis and the resulting formation water provides a means to unravel the evolution processes in the basin. In most cases, the lack of isotopic and trace element analysis tests in this type of basin limits the research on the origin and evolution of formation water in this area. We have used multivariate statistical methods to classify the geochemical characteristics of the formation water for the Cenozoic Formation of Bonan Sag in the Bohai Bay Basin. Analysis of correlations among the evolution processes of different ions in different types of formation water provides an understanding of the primary factors influencing the ion content. We also evaluate the water-rock interactions of different types of formation water to evaluate their geologic significance, and we find three types. Type I formation water includes a mixture of river water, lake water, and atmospheric precipitation and exhibits weak water-rock interactions. Type II formation water contains primitive freshwater and brackish lake water that has undergone an evolution process similar to that of type I formation water, but that was followed by evaporation and concentration, the dissolution and precipitation of calcite and iron calcite, and feldspar dissolution. Type III formation water, which is a product of rock reconstruction, originates from saline lake sediment water. After undergoing evolution processes similar to those of types I and II, type III formation water is also affected by dissolution of evaporite, albite, dolomite, and iron dolomite. Thus, type III formation water is the product of water-rock interactions such as precipitation, SO42− reduction, and pyrite precipitation in which the water-rock reaction controls the development mechanism and characteristics of the reservoir space.

Predictive distribution of high-quality tight reservoirs of coarse clastic rocks by linking diagenesis to sedimentary facies: Evidence from the upper Sha 4 Member in the northern Bonan Sag, Bohai Bay Basin, eastern China

2018 ◽  
Vol 6 (2) ◽  
pp. T413-T429 ◽  
Author(s):  
Dong Wu ◽  
Xiantai Liu ◽  
Yushan Du ◽  
Long Jiang ◽  
Ziyan Cheng
Keyword(s):  
Eastern China ◽  
Sedimentary Facies ◽  
Middle Part ◽  
Bohai Bay ◽  
Bohai Bay Basin ◽  
High Quality ◽  
Clastic Rocks ◽  
Bonan Sag ◽  
Tight Reservoirs ◽  
Channel Deposits

Coarse clastic rocks of the upper Sha 4 Member in the northern Bonan Sag of the Bohai Bay Basin in eastern China are important hydrocarbon reservoirs. The deposits are tight reservoirs owing to the low porosity (less than 10%) and low permeability (less than 1 mD). Because of the strong heterogeneity, although the reserve in the northern Bonan Sag is remarkable, only 4.9% of the reserves are recovered. We have studied these tight reservoirs by linking diagenesis to sedimentary facies to help predict the distribution of high-quality tight reservoirs. Petrographic analysis is undertaken based on cores, thin sections, X-ray diffraction and scanning electron microscope, helpful to understand the impacts on tight reservoirs of sedimentary factors and diagenesis factors. Sedimentary microfacies, lithologic characteristics, reservoir property, diagenesis, and diagenetic minerals are studied. Coarse clastic rocks are deposited mainly in nearshore subaqueous fans and fan deltas. The multistage sandstones are the valid reservoirs of coarse clastic rocks and dominated by feldspathic litharenite, lithic arkose, and arkose. The reservoir property is poor principally owing to the strong compaction and cementation. Pores are composed of secondary pores and primary pores. The secondary pore, generated in the dissolution of detrital minerals and/or cements, is the major type of pores and important to porosity improvement. By linking diagenesis to sedimentary facies, it can be concluded that high-quality tight reservoirs of coarse clastic rocks of the upper Sha 4 Member in the northern Bonan Sag of Bohai Bay Basin in eastern China are associated with medium to coarse-grain sandstones, found in the middle part of underwater distributary channel deposits in fan deltas and in the middle part of underwater channel deposits in nearshore subaqueous fans, with abundant secondary porosity but low cement contents, vertically at depths ranging from 3500 to 4100 m.

Fracture characteristics and logging identification of lacustrine shale in the Jiyang Depression, Bohai Bay Basin, Eastern China

2021 ◽  
pp. 105192
Author(s):  
Shaolong Zhang ◽  
Jianping Yan ◽  
Jingong Cai ◽  
Xiaojun Zhu ◽  
Qinhong Hu ◽  
...  
Keyword(s):  
Eastern China ◽  
Bohai Bay ◽  
Bohai Bay Basin ◽  
Fracture Characteristics ◽  
Jiyang Depression ◽  
Lacustrine Shale

Sedimentology and lithofacies of lacustrine shale: A case study from the Dongpu sag, Bohai Bay Basin, Eastern China

2018 ◽  
Vol 60 ◽  
pp. 174-189 ◽  
Author(s):  
Chuanyan Huang ◽  
Jinchuan Zhang ◽  
Wang Hua ◽  
Jiaheng Yue ◽  
Yongchao Lu
Keyword(s):  
Eastern China ◽  
Bohai Bay ◽  
Bohai Bay Basin ◽  
Lacustrine Shale

Fractures of lacustrine shale reservoirs, the Zhanhua Depression in the Bohai Bay Basin, eastern China

2013 ◽  
Vol 48 ◽  
pp. 113-123 ◽  
Author(s):  
Kai Jiu ◽  
WenLong Ding ◽  
WenHui Huang ◽  
Yeqian Zhang ◽  
Song Zhao ◽  
...  
Keyword(s):  
Eastern China ◽  
Bohai Bay ◽  
Bohai Bay Basin ◽  
Lacustrine Shale ◽  
Shale Reservoirs

scholarly journals Movability of lacustrine shale oil: A case study of Dongying Sag, Jiyang Depression, Bohai Bay Basin

2014 ◽  
Vol 41 (6) ◽  
pp. 703-711 ◽  
Author(s):  
Linye ZHANG ◽  
Youshu BAO ◽  
Juyuan LI ◽  
Zheng LI ◽  
Rifang ZHU ◽  
...  
Keyword(s):  
Bohai Bay ◽  
Shale Oil ◽  
Bohai Bay Basin ◽  
Jiyang Depression ◽  
Dongying Sag ◽  
Lacustrine Shale
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