scholarly journals Geochemical characteristics and hydrocarbon expulsion of source rocks in the first member of the Qingshankou Formation in the Qijia‐Gulong Sag, Songliao Basin, Northeast China: Evaluation of shale oil resource potential

2020 ◽  
Vol 8 (5) ◽  
pp. 1450-1467
Author(s):  
Zhipeng Huo ◽  
Shibo Hao ◽  
Bo Liu ◽  
Jinchuan Zhang ◽  
Jianghui Ding ◽  
...  
Keyword(s):  
Northeast China ◽  
Songliao Basin ◽  
Geochemical Characteristics ◽  
Source Rocks ◽  
Shale Oil ◽  
Resource Potential ◽  
Hydrocarbon Expulsion

scholarly journals Geochemical Characteristics of the Lower Cretaceous HengTongshan Formation in the Tonghua Basin, Northeast China: Implications for Depositional Environment and Shale Oil Potential Evaluation

2020 ◽  
Vol 11 (1) ◽  
pp. 23
Author(s):  
Wentong He ◽  
Youhong Sun ◽  
Xuanlong Shan
Keyword(s):  
Organic Matter ◽  
Natural Gas ◽  
Northeast China ◽  
Depositional Environment ◽  
Oil And Gas ◽  
Higher Plants ◽  
Source Rocks ◽  
Shale Oil ◽  
Resource Potential ◽  
Reducing Environment

The Tonghua Basin in Northeast China potentially contains shale oil and gas resources, but the exploration and development of these resources has been limited. The Sankeyushu depression represents the sedimentary center of the Tonghua Basin, and a large thickness of shale, the Hengtongshan Formation, was deposited in this depression. Exploratory engineering discoveries in recent years have confirmed that the Hengtongshan Formation has the potential to produce oil and gas. A series of methods, including inorganic and organic geochemistry and organic petrology, have been used to study the source material, organic matter maturity, depositional environment and oil-generating potential of the Hengtongshan Formation. Investigation of drill core samples has revealed that the Hengtongshan Formation in the Sankeyushu depression is mainly composed of black shale, with a small amount of plant fossils and thin volcanic rocks, and the content of brittle minerals (quartz + carbonate minerals) is high. The provenance of organic matter in the source rocks in the Hengtongshan Formation is a mixture of aquatic organisms (algae and bacteria) and higher plants, and there may be some marine organic components present in some strata.The organic matter was deposited and preserved in a saline reducing environment. Volcanism may have promoted the formation of a reducing environment by stratification of the lake bottom water, and the lake may have experienced a short-term marine ingression with the increase in the salinity. The maturity of the organic matter in all the source rocks in the Hengtongshan Formation is relatively high, and hydrocarbons have been generated. Some source rocks may have been affected by volcanism, and the organic matter in these rocks is overmature. In terms of the shale oil resource potential, the second member of the Hengtongshan Formation is obviously superior to the other members, with an average total organic carbon (TOC) of 1.37% and an average hydrogen index (HI) of 560.93 mg HC/g TOC. Most of the samples can be classified as good to very good source rocks with good resource potential. The second member can be regarded as a potential production stratum. According to the results of geochemical analysis and observations of shale oil and natural gas during drilling, it is predicted that the shale oil is present in the form of a self-sourced reservoir, but the migration range of natural gas is likely relatively large.

scholarly journals Enrichment Factors and Resource Potential Evaluation of Qingshankou Formation Lacustrine Shale Oil in the Southern Songliao Basin, NE China

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-20
Author(s):  
Long Luo ◽  
Dongping Tan ◽  
Xiaojun Zha ◽  
Xianfeng Tan ◽  
Jing Bai ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Well Logging ◽  
Enrichment Factors ◽  
Songliao Basin ◽  
Hydrocarbon Generation ◽  
Shale Oil ◽  
Resource Potential ◽  
Potential Evaluation ◽  
Lacustrine Shale ◽  
Exploration And Development

China shale oil, which is preserved in lacustrine shale with strong heterogeneity and relatively low maturity, has been a research hotspot of unconventional resources. However, controlling factors of shale oil enrichment and resource potential evaluation restricted efficient exploration and development of lacustrine shale oil. On the basis of well logging data, TOC content, Rock-Eval pyrolysis values, thermal maturity, 100 oil saturation data, and pressure coefficient, the core observation, X-ray diffraction analysis, physical property analysis, scanning electron microscopy, CT scan, well logging interpretation, and volumetric genesis method depending on three-dimensional geological modeling were used to determine enrichment factors and evaluate the resource potential of Qingshankou Formation shale oil in the Southern Songliao Basin. Shale oil was mainly enriched in the semideep and deep lake shale of K2qn1, with the high capacity of hydrocarbon generation and favorable petrological and mineralogical characteristics, pore space characteristics, and physical properties in the low structural part of the Southern Songliao Basin. The three-dimensional geological resource model of Qingshankou Formation lacustrine shale oil was determined by the key parameters (Ro, TOC, and S 1 ) of shale oil in the favorable zone of the Southern Songliao Basin, northeast China. The geological resource of shale oil, which was calculated by two grid computing methods ( F 1 and F 2 ), was, respectively, 1.713 × 10 12   kg and 1.654 × 10 12   kg . The great shale oil resource indicates a promising future in the exploration and development of Qingshankou Formation shale oil of the Southern Songliao Basin.

Extended 3β-methylhopanes up to C45 in source rocks from the Upper Cretaceous Qingshankou Formation, Songliao Basin, northeast China

2020 ◽  
Vol 142 ◽  
pp. 103998
Author(s):  
Changfeng Zhu ◽  
Xingqian Cui ◽  
Yuxin He ◽  
Lishu Kong ◽  
Yongge Sun
Keyword(s):  
Northeast China ◽  
Upper Cretaceous ◽  
Songliao Basin ◽  
Source Rocks

Enrichment and distribution of shale oil in the Cretaceous Qingshankou Formation, Songliao Basin, Northeast China

2017 ◽  
Vol 86 ◽  
pp. 751-770 ◽  
Author(s):  
Chenglin Liu ◽  
Ziling Wang ◽  
Zeqing Guo ◽  
Weiyu Hong ◽  
Chao Dun ◽  
...  
Keyword(s):  
Northeast China ◽  
Songliao Basin ◽  
Shale Oil
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