發(fā)布時(shí)間：2018-05-04 08:26

  本文選題：淺層氣 + 原油伴生氣��； 參考：《吉林大學(xué)》2015年碩士論文

【摘要】：本文針對(duì)松遼盆地淺層氣目前亟待解決的天然氣成因類型,形成條件和有利區(qū)分布等問題,著眼于國內(nèi)外前沿的天然氣分析技術(shù)和研究方法,從研究淺層氣的地球化學(xué)特征入手,分析泥巖物性特征、原油地球化學(xué)特征和地層水特征等,結(jié)合油氣水的分布關(guān)系及構(gòu)造、斷裂等地質(zhì)條件,開展實(shí)驗(yàn)技術(shù)和研究方法攻關(guān),建立氣組分分段切割檢測(cè)和原油輕烴碳同位素分析檢測(cè)技術(shù),為下步淺層氣勘探部署提供了技術(shù)支持。主要的成果和認(rèn)識(shí)如下:1.松遼盆地目前發(fā)現(xiàn)的淺層氣以次生為主,包括原油伴生氣(喇嘛甸、杏樹崗、新站、四站和朝陽溝地區(qū));原油菌解氣(葡南、敖南、西部斜坡區(qū))和高過成熟氣(宋站、升平、長春嶺等);目前在松遼盆地發(fā)現(xiàn)的源巖菌解氣僅以顯示為主。2.原油伴生氣是下伏油層原油經(jīng)歷蒸發(fā)作用和氣洗作用,通過斷裂溝通,在淺層聚集成藏的;除了長垣北、新站、白音諾勒、四站和朝陽溝已見到原油伴生氣的地區(qū)外,原油伴生氣相對(duì)較有利區(qū)應(yīng)是古龍凹陷的龍南油田、古龍油田、英臺(tái)地區(qū)及龍虎泡階地。3.原油菌解氣的形成需要地層水由儲(chǔ)層或斷層與地表水溝通,為微生物生存提供營養(yǎng);油層與活躍的地層水接觸;成藏晚,后期構(gòu)造活動(dòng)弱。除已發(fā)現(xiàn)的西部斜坡薩爾圖油層和長垣南黑帝廟油層外,原油菌解氣相對(duì)較有利區(qū)是敖古拉油氣田、龍虎泡油田和葡西油田的薩爾圖油層,龍南油田和古龍油田的黑帝廟油層。4.源巖菌解氣的形成需要有一定豐度的低熟烴源巖;源巖滲透率相對(duì)較高,適合生物生存,可持續(xù)供氣;后期構(gòu)造活動(dòng)較弱,有利于氣的保存�，F(xiàn)今松遼盆地泥巖滲透率大多數(shù)都低于0.1m D,已不適合生成生物氣,尋找早期的原生生物氣需在構(gòu)造活動(dòng)相對(duì)較弱的地區(qū),濱北地區(qū)斷層分布較少,晚期構(gòu)造活動(dòng)弱,相對(duì)有利的地區(qū)是烏裕爾凹陷、富裕構(gòu)造和黑魚泡凹陷。5.高—過成熟氣需要下伏有深部氣源,有斷層溝通,晚期構(gòu)造破壞較小。高—過成熟氣與沙河子組烴源巖分布關(guān)系密切,主要分布在沙河子烴源巖分布較厚的地區(qū)。
[Abstract]:In this paper, aiming at the problems of natural gas genetic type, forming conditions and favorable division of shallow gas in Songliao Basin, the paper focuses on the advanced natural gas analysis technology and research methods at home and abroad. Based on the study of the geochemical characteristics of shallow gas, the physical properties of mudstone, the geochemical characteristics of crude oil and the characteristics of formation water are analyzed. Combined with the distribution of oil, gas and water and geological conditions such as structure and fault, the key problems are solved by experimental techniques and research methods. The techniques of gas component segmentation and carbon isotope analysis of light hydrocarbon in crude oil are established, which provide technical support for the next step of shallow gas exploration and deployment. The main achievements and understandings are as follows: 1. At present, the shallow gas found in Songliao Basin is mainly secondary, including crude oil associated gas (Lamadian, Xingshugang, Xinzheng Station, four stations and Chaoyang ditch area), crude oil bacteriolysis gas (Punan, Aonan, western slope area) and higher than mature gas (Song station, Shengping, Changchun Ridge et al. At present, the source rock bacteria pyrolysis gas found in Songliao Basin is mainly shown as. 2. Crude oil associated gas is accumulated in shallow layers through fault communication through evaporation and gas washing of crude oil in underlying reservoirs; except for areas where crude oil has been associated with gas in Changyuan North, New Station, Baiyinole, four stations and Chaoyang ditch, The relatively favorable areas for crude oil associated gas generation should be Longnan oilfield, Gulong oilfield, Yingtai area and Longhu bubble terrace of Gulong sag. The formation of bacteriolytic gas of crude oil requires formation water to communicate with surface water by reservoir or fault, which provides nutrition for the survival of microorganism; contact between reservoir and active formation water; late reservoir formation; weak late tectonic activity. In addition to the Saltu reservoir and the southern Heidimiao oil layer on the western slope of Changyuan, the relatively favorable areas for the release gas of crude oil bacteria are Oogula oil field, Longhubao oil field and Puxi oil field, and the Heidimiao reservoir of Longnan and Gulong oil fields. The formation of source rock bacteria release gas requires low mature source rock with certain abundance; the source rock permeability is relatively high, suitable for biological survival, sustainable gas supply; the late tectonic activity is weak, which is conducive to gas preservation. Nowadays, the permeability of mudstone in Songliao Basin is less than 0.1m D, which is no longer suitable for biogas generation. In the area where the tectonic activity is relatively weak, the distribution of faults in Binbei area is less, and the late tectonic activity is weak. The relatively favorable areas are the Wuyu Sag, the Fuyu structure and the Blackfish Pao Sag. 5. High-over-mature gas needs deep gas source, fault communication and minor structural damage in the late stage. High-over-mature gas is closely related to the distribution of source rocks in Shahezi formation, which is mainly distributed in areas where the source rocks of Shahezi formation are thicker.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13

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