紙坊北-順寧油區(qū)長6、長7致密油成藏機理研究
發(fā)布時間：2019-05-07 07:27
【摘要】：通過巖心觀察、測井分析、分析化驗資料、試油資料、鉆井資料、實驗分析等,結合沉積學、石油地質學、油氣成藏地球化學、油氣成藏理論、成藏動力學等理論基礎,研究了紙坊北-順寧油區(qū)三疊系延長組長6、長7的成藏機理中的“生”、“運”、“聚”,具體得到的認識如下:(1)長6油層組和長71砂層組的沉積環(huán)境是三角洲前緣亞相,長72砂層組的沉積環(huán)境是半深湖-深湖亞相。長6、長7儲層為致密儲層,以長石砂巖為主,孔隙結構復雜,長6的物性優(yōu)于長7。(2)研究區(qū)長7“張家灘頁巖”厚度主要在30-45m之間,總有機碳含量相對較高,生烴強度為157.7×104 t/km2。利用包裹體確定研究區(qū)油氣充注期次與充注時間。烴源巖在生烴過程中由于生烴增壓產(chǎn)生了異常高壓,為油氣的初次運移提供了動力,且超壓還使烴源巖產(chǎn)生微裂縫,為油氣的初次運移提供了運移通道。(3)長6、長7油藏類型主要為致密巖性油藏,油藏在儲層中大范圍準連續(xù)分布,在平面上大面積連續(xù)分布的非常規(guī)油藏。油水分布不明顯,沒有發(fā)現(xiàn)明顯的油水界面,屬于典型的致密油藏。長7烴源巖內(nèi)部為頁巖油,屬于自生自儲連續(xù)聚集;源外近源長6-長7為準連續(xù)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.
【學位授予單位】：西安石油大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：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.
【學位授予單位】：西安石油大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：P618.13
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