纸坊北-顺宁油区长6、长7致密油成藏机理研究
发布时间：2019-05-07 07:27
【摘要】：通过岩心观察、测井分析、分析化验资料、试油资料、钻井资料、实验分析等,结合沉积学、石油地质学、油气成藏地球化学、油气成藏理论、成藏动力学等理论基础,研究了纸坊北-顺宁油区三叠系延长组长6、长7的成藏机理中的“生”、“运”、“聚”,具体得到的认识如下:(1)长6油层组和长71砂层组的沉积环境是三角洲前缘亚相,长72砂层组的沉积环境是半深湖-深湖亚相。长6、长7储层为致密储层,以长石砂岩为主,孔隙结构复杂,长6的物性优于长7。(2)研究区长7“张家滩页岩”厚度主要在30-45m之间,总有机碳含量相对较高,生烃强度为157.7×104 t/km2。利用包裹体确定研究区油气充注期次与充注时间。烃源岩在生烃过程中由于生烃增压产生了异常高压,为油气的初次运移提供了动力,且超压还使烃源岩产生微裂缝,为油气的初次运移提供了运移通道。(3)长6、长7油藏类型主要为致密岩性油藏,油藏在储层中大范围准连续分布,在平面上大面积连续分布的非常规油藏。油水分布不明显,没有发现明显的油水界面,属于典型的致密油藏。长7烃源岩内部为页岩油,属于自生自储连续聚集;源外近源长6-长7为准连续型致密油。
[Abstract]:Through core observation, well logging analysis, analysis of test data, test oil data, drilling data, experimental analysis, etc., combined with the theoretical basis of sedimentology, petroleum geology, oil and gas accumulation geochemistry, oil and gas accumulation theory, hydrocarbon accumulation dynamics and so on, The "birth", "transport" and "poly" in the reservoir-forming mechanism of the Triassic Yanchang Formation in the North-Shining oil region of the paper mill are studied. The results are as follows: (1) The sedimentary environment of the Chang 6 oil layer group and the long 71 sand layer group is the delta front subfacies, The sedimentary environment of the 72-sand-sand group is the semi-deep lake-deep-lake sub-facies. The long 6 and 7 reservoirs are dense reservoirs, with feldspar sandstone as the main, the pore structure is complicated, and the physical property of the long 6 is better than that of the long 7. (2) The 7-"Zhangjiahe Shale" thickness of the study area is mainly between 30-45m, the total organic carbon content is relatively high, and the hydrocarbon generation intensity is 157.7-104t/ km2. The time of filling and filling of oil and gas in the study area was determined by the inclusion body. In the process of hydrocarbon generation, the source rock produces abnormal high pressure due to the pressurization of the raw hydrocarbon, and provides the power for the initial migration of the oil and gas, and the overpressure also causes the source rock to generate micro-cracks, thus providing the migration channel for the initial migration of the oil and gas. (3) The long 6 and 7 reservoir types are mainly dense and lithologic reservoirs, and the reservoir is a quasi-continuous distribution in the reservoir, and is a non-conventional oil reservoir with large area and continuous distribution in the plane. The oil-water distribution is not obvious, no obvious oil-water interface is found, and belongs to a typical compact oil reservoir. The long 7 source rock is shale oil, which belongs to the self-self-storage and continuous accumulation, and the near-source length of the source is 6-7, which is the continuous type of dense oil.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13
[Abstract]:Through core observation, well logging analysis, analysis of test data, test oil data, drilling data, experimental analysis, etc., combined with the theoretical basis of sedimentology, petroleum geology, oil and gas accumulation geochemistry, oil and gas accumulation theory, hydrocarbon accumulation dynamics and so on, The "birth", "transport" and "poly" in the reservoir-forming mechanism of the Triassic Yanchang Formation in the North-Shining oil region of the paper mill are studied. The results are as follows: (1) The sedimentary environment of the Chang 6 oil layer group and the long 71 sand layer group is the delta front subfacies, The sedimentary environment of the 72-sand-sand group is the semi-deep lake-deep-lake sub-facies. The long 6 and 7 reservoirs are dense reservoirs, with feldspar sandstone as the main, the pore structure is complicated, and the physical property of the long 6 is better than that of the long 7. (2) The 7-"Zhangjiahe Shale" thickness of the study area is mainly between 30-45m, the total organic carbon content is relatively high, and the hydrocarbon generation intensity is 157.7-104t/ km2. The time of filling and filling of oil and gas in the study area was determined by the inclusion body. In the process of hydrocarbon generation, the source rock produces abnormal high pressure due to the pressurization of the raw hydrocarbon, and provides the power for the initial migration of the oil and gas, and the overpressure also causes the source rock to generate micro-cracks, thus providing the migration channel for the initial migration of the oil and gas. (3) The long 6 and 7 reservoir types are mainly dense and lithologic reservoirs, and the reservoir is a quasi-continuous distribution in the reservoir, and is a non-conventional oil reservoir with large area and continuous distribution in the plane. The oil-water distribution is not obvious, no obvious oil-water interface is found, and belongs to a typical compact oil reservoir. The long 7 source rock is shale oil, which belongs to the self-self-storage and continuous accumulation, and the near-source length of the source is 6-7, which is the continuous type of dense oil.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13
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