【摘要】：鄂爾多斯盆地三疊系延長組致密油資源豐富,本文針對(duì)鄂爾多斯盆地三疊系延長組致密油,從烴源巖、儲(chǔ)層特征、源儲(chǔ)關(guān)系等方面綜合分析了鄂爾多斯盆地致密油形成條件,并優(yōu)選了致密油有利區(qū)帶。在此基礎(chǔ)上,構(gòu)建了鄂爾多斯盆地致密油資源優(yōu)度綜合評(píng)價(jià)指標(biāo)體系,運(yùn)用層次分析法和雙因素法對(duì)延長組致密油開展了綜合評(píng)價(jià)與區(qū)劃研究。結(jié)合國內(nèi)外致密油勘探開發(fā)現(xiàn)狀,本文將儲(chǔ)層地面空氣滲透率小于1md,孔隙度小于12%,石油未經(jīng)過大規(guī)模長距離運(yùn)移的烴源巖外油藏稱為致密油。鄂爾多斯盆地延長組主要為致密砂巖儲(chǔ)層。以隴東地區(qū)延長組致密砂巖油為例,研究了致密砂巖油的形成條件。延長組中下段共有兩類烴源巖,長7油頁巖和長4+5-長9暗色泥巖,源巖分布面積廣,有機(jī)碳含量高,普遍達(dá)成熟階段;致密儲(chǔ)層長石巖屑含量相對(duì)較高,以次生孔隙為主,孔隙結(jié)構(gòu)復(fù)雜,主要聚集于臨近生烴中心的三角洲前緣水下分流河道、湖盆中央的重力流沉積砂體中,與源巖大面積接觸,中—強(qiáng)壓實(shí)作用是隴東地區(qū)延長組砂巖儲(chǔ)層致密的主要原因,其次為膠結(jié)作用。明確了儲(chǔ)層致密史與成藏史之間關(guān)系,認(rèn)為儲(chǔ)層先期差異致密,而后大規(guī)模成藏。平面上將延長組有利砂體分布圖與有效烴源巖圖疊合,優(yōu)選出鄂爾多斯盆地致密砂巖油有利區(qū),長8致密油主要分布于西北和西南部,長7致密油主要分布于華池一帶,長6致密油分布廣泛。圍繞礦產(chǎn)資源規(guī)劃編制的需求,結(jié)合鄂爾多斯致密油資源研究現(xiàn)狀,從勘探和開發(fā)兩個(gè)大的方面開展其資源優(yōu)度綜合評(píng)價(jià),構(gòu)建了致密油綜合評(píng)價(jià)指標(biāo)體系,包括資源條件和外部條件(地形地貌、可壓裂性)。運(yùn)用雙因素法將致密油有利區(qū)劃分為:優(yōu)先勘探(開發(fā))區(qū)、次級(jí)勘探(開發(fā))區(qū)和勘探(開發(fā))后備區(qū)。優(yōu)先勘探(開發(fā))區(qū)為西南部和湖盆中部。
[Abstract]:The dense oil resources of the Triassic Yanchang Formation in the Ordos Basin are rich, and the dense oil formation condition of the Ordos Basin is comprehensively analyzed from the aspects of the hydrocarbon source rock, the reservoir characteristics and the source storage relationship in the Triassic Yanchang Formation of the Ordos Basin, and the favorable zone of the compact oil is preferred. On the basis of this, the comprehensive evaluation index system of the dense oil resources in the Ordos Basin is constructed, and the comprehensive evaluation and zoning of the extended group of dense oil are carried out by using the analytic hierarchy process and the two-factor method. In combination with the present situation of the exploration and development of the dense oil at home and abroad, the permeability of the ground air of the reservoir is less than 1md, the porosity is less than 12%, and the petroleum not subjected to large-scale long-distance migration is known as the dense oil. The Yanchang Formation in the Ordos Basin is mainly a tight sandstone reservoir. In this paper, the formation conditions of tight sandstone oil were studied by using the dense sandstone oil of Longdong area as an example. In the extended group, there are two types of hydrocarbon source rocks, 7 oil shale and 4 + 5-long 9 dark mudstone, the source rock has a wide distribution area and high organic carbon content, and the mature stage is generally reached; the compact reservoir feldspar debris content is relatively high, the secondary pore is the main pore, the pore structure is complex, It is mainly concentrated in the subaqueous distributary channel of the delta front of the adjacent hydrocarbon center, and the gravity flow in the center of the lake basin is in contact with the source rock, and the strong compaction of the medium is the main cause of the compaction of the sandstone reservoir in the extension group in the Longdong area, and the second is the cementation. The relationship between the reservoir dense history and the reservoir history is defined, and the reservoir early difference is considered to be compact and then large-scale is hidden. in that plane, the favorable sand body distribution map of the extension group is superposed with the effective hydrocarbon source rock pattern, and the favorable region of the tight sandstone oil in the Ordos basin is preferably formed, and the long 8-dense oil is mainly distributed in the northwest and the south-west, and the long 7-dense oil is mainly distributed in the China basin, and the long 6-dense oil is widely distributed. According to the demand of the development of the mineral resources planning, combined with the present situation of the study of the resources of the compact oil in the ordos, the comprehensive evaluation of its resources is carried out from two large aspects of exploration and development, and the comprehensive evaluation index system of the compact oil is constructed, including the resource conditions and the external conditions (topography, Fracturing). The two-factor method is used to divide the favorable region of the compact oil into the priority exploration (development) area, the secondary exploration (development) area and the exploration (development) reserve area. The priority areas for exploration (development) are in the south-west and in the middle of the lake basin.
【學(xué)位授予單位】：中國石油大學(xué)(華東)
【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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本文編號(hào)：2430045