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Liu B.,Northeast Petroleum University | Liu B.,Sealing and Fluid Migration Science and Technology Innovation Team in Colleges and Universities of Heilongjiang | Lu Y.,Northeast Petroleum University | Meng Y.,Northeast Petroleum University | And 4 more authors.
Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development | Year: 2015

Taking the Permian Lucaogou Formation in the Malang sag, Santanghu Basin as an example, by using petrological methods such as high resolution core image scanning, conventional thin section, scanning electron microscope and energy spectrum analysis and geochemical tests such as trace elements and biomarker compounds, the petrologic features and sedimentary origin of the lamellar organic rich fine-grained rocks of lake facies were investigated, and its significance for shale oil and tight oil exploration was analyzed. The results of the study show that there are four types of laminae, siliciclastic enrichment laminae, carbonate enrichment laminae, tuffaceous enrichment laminae and organic matter enrichment laminae, which can form three kinds of layer combinations. Organic matter is laminar enrichment or dispersed in the carbonate laminae and tuff laminae. Stratification of ancient lake water was formed in the closed saline lake sedimentary systems with insufficient continental clast supply, and the activity of warm water at the lake bottom and the monsoon climate worked jointly to control enrichment of organic matter and formation of lacustrine lamina fine-grained rocks. This kind of fine-grained rocks have higher potential of hydrocarbon generation due to high abundance of organic matter, are rich in reservoir space due to the existence of micro-pores in carbonate laminae and micro-cracks between the laminae, and suitable for fracturing because of high brittle mineral content. They have favorable conditions for shale oil and tight oil accumulation, and are significant for exploration. ©, 2015, Science Press. All right reserved. Source


Liu B.,Northeast Petroleum University | Liu B.,Sealing and Fluid Migration Science and Technology Innovation Team in Colleges and Universities of Heilongjiang | He J.,Northeast Petroleum University | He J.,Sealing and Fluid Migration Science and Technology Innovation Team in Colleges and Universities of Heilongjiang | And 5 more authors.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2014

Based on the status of shale oil exploration and development in China, and related work of shale oil and gas resource evaluation and favorable area optimization, the factors affecting the abundance of residual hydrocarbon in shale were studied, and the index and method for shale oil assessment were put forward. The results show that based on statistical analysis of shale parameters of Qingshankou Formation of Songliao Basin, mass fraction wA of chloroform bitumen not only has a positive correlation with ws1, i.e the mass ratio of hydrocarbon to rock, and its composition is closer to that of crude oil influenced by shale organic matter abundance and maturity. A quantitative calculation model can be established, and chloroform bitumen wA is the important parameter for shale oil resources evaluation. Through the hydrocarbon generation kinetics theory, combined with the quantity of residual hydrocarbon with mature trend, the lower limit of shale oil enriching area of northern Songliao Basin is 0.35%, and shale oil resources of first member volume of Qingshankou Formation calculated by Monte Carlo method is 96.41×108 t. ©, 2014, Central South University of Technology. All right reserved. Source


Liu B.,Northeast Petroleum University | Liu B.,Sealing and Fluid Migration Science and Technology Innovation Team in Colleges and Universities of Heilongjiang | Jia M.,Northeast Petroleum University | Jia M.,Sealing and Fluid Migration Science and Technology Innovation Team in Colleges and Universities of Heilongjiang | And 5 more authors.
Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology | Year: 2016

To identify the genesis connection of the complex phase states of the gas in Nanpu sag is conducive to the natural gas exploration achievements in the area. Based on the geochemical behavior of natural gas, the formation PVT and deliverability data, the phases of underground natural gas and its distribution characteristics were studied, the origin of phases of natural gas and their relationships were analyzed; and sealing limit of different phases of gas was given from macro and micro sealing mechanism of caprock by using faulted thickness of caprock and displacement pressure; meanwhile, exploration direction of natural gas was determined by the geochemical tracing method. The results show that the natural gas in Nanpu sag can be divided into three phase states: oil-dissolved gas, gas-cap gas, and condensate gas. The main content of deep natural gas is condensate gas; in middle layer, oil-dissolved gas and gas-cap gas are the most widespread. Because of the coexistence status, gas-cap gas is most likely to be sealed, with the thickness of caprock juxtaposition by fault being 50-180 m and the lower limit of displacement pressure being about 1.5 MPa; pure gas pool formed by deep condensate gas takes second place; oil-dissolved gas in the presence of a single phase oil column demands the highest sealing conditions. Because the deep natural gas mainly exists in the form of condensate gas, gas sealing limit is relatively low. Natural gas in shallow layer has the same geochemical response with the deep natural gas, which reflects the large potential of deep natural gas deposit in Nanpu sag. Consequently, the prospecting of offshore deep natural gas should be strengthened and breakthrough is expected in the deep land area exploitation. © 2016, Editorial Board of Journal of CUMT. All right reserved. Source


Liu B.,Northeast Petroleum University | Liu B.,Sealing and Fluid Migration Science and Technology Innovation Team in Colleges and Universities of Heilongjiang | Lu J.,Northeast Petroleum University | Lu J.,Sealing and Fluid Migration Science and Technology Innovation Team in Colleges and Universities of Heilongjiang | And 4 more authors.
Oil and Gas Geology | Year: 2015

Because of the complicated genetic types of gas, accurate identification of the sources of the nature gas has great significance to gas exploration in the Fangzheng Fault Depression. First, the genetic types of natural gas were classified based on the gas components, alkane carbon isotopes and in combination with the actual geological conditions. Then, the thermal maturity of gas was correlated with source rocks in different tectonic units to reveal the gas sources based on identification of organic types and thermal evolution degree. The results show that the gas of this area can be divided into three types. Type A is dry gas and its genetic type is catalytic transitional zone gas generated by lacustrine mudstone in the Xin'ancun-Wuyun Formations. Type B is wet gas and its genetic type is thermal coal-related gas generated by coal measure mudstones. Type C is also wet gas and its genetic type is petroliferous gas generated partly by humic organic ma-tter. It is associated with the oil generated by humic organic matters and is of hybrid sources. Differential structural activity on two sides of Yihantong fault is the main factor leading to the different geochemical characteristics and accumulation patterns of natural gas between the east and west sags. ©, 2015, Oil and Gas Geology Editorial Board. All right reserved. Source

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