【摘要】：三江盆地位于我國(guó)黑龍江省東部，大地構(gòu)造位置處于中亞蒙古構(gòu)造域和東北亞環(huán)西太平洋構(gòu)造帶的復(fù)合部位，是以陸相沉積為主、海相和海陸過渡相為輔的中新生代含油氣盆地，由于其構(gòu)造環(huán)境及沉積特征的特殊性，三江盆地在我國(guó)中生代地層研究中占有重要地位。本文在前人研究成果的基礎(chǔ)上，充分利用野外露頭剖面以及錄井、測(cè)井、地震資料，通過室內(nèi)鏡下觀察、樣品分析測(cè)試，結(jié)合有機(jī)地球化學(xué)、薄片鑒定等多種有效的分析手段，對(duì)三江盆地西部綏濱坳陷上侏羅 下白堊統(tǒng)地層的石油地質(zhì)特征進(jìn)行了研究。 首先對(duì)綏濱坳陷上侏羅統(tǒng) 下白堊統(tǒng)主要目的層段沉積特征進(jìn)行了研究，結(jié)果表明：綏濱坳陷主要發(fā)育沖積扇相、（扇）三角洲相、湖泊相、湖底扇相、海相共5種沉積相、13種亞相、23種微相；中、晚侏羅世，綏濱坳陷發(fā)生廣泛的海侵，海水由北向南侵入，，沉積了一套以海相沉積為主的綏濱-東榮組地層，地層發(fā)育具有北部厚、南部薄的特點(diǎn)；早白堊世初期，海水開始退出，沉積了一套以三角洲相為主、濱淺湖相為輔的城子河組地層，沉積中心與沉降中心均位于坳陷西部偏南；至早白堊世中期，海水完全退卻，沉積了一套以湖泊相為主的穆棱組地層，沉積、沉降中心仍位于坳陷西部偏南。 其次，對(duì)綏濱坳陷烴源巖層、儲(chǔ)集層、蓋層進(jìn)行了綜合評(píng)價(jià)，結(jié)果表明：研究區(qū)主要發(fā)育城子河組、穆棱組兩套烴源巖。城子河組暗色泥巖為好-較好烴源巖，有機(jī)質(zhì)類型為腐殖-腐泥腐殖（Ⅱ2-Ⅲ）型，有機(jī)質(zhì)多處于過成熟階段；穆棱組暗色泥巖為較好烴源巖，有機(jī)質(zhì)類型以腐殖型（Ⅲ）為主，有機(jī)質(zhì)多處于成熟-高成熟階段。綜合分析認(rèn)為研究區(qū)烴源巖生烴能力較好，以生氣為主；儲(chǔ)層主要分布在城子河組、穆棱組中，儲(chǔ)層類型以三角洲前緣亞相的水下分流河道砂體為主，其次為湖底扇砂體。砂巖碎屑類型以長(zhǎng)石、巖屑為主，石英含量較低。儲(chǔ)層砂巖發(fā)育粒間孔等原生孔隙及粒間溶孔、粒內(nèi)溶孔等次生孔隙。城子河組砂巖儲(chǔ)層成巖階段為中成巖階段B期-晚成巖階段，穆棱組巖儲(chǔ)層成巖階段為中成巖階段；城子河組儲(chǔ)層孔隙度與滲透率均非常低，為超低孔-超低滲儲(chǔ)層，穆棱組儲(chǔ)層性能優(yōu)于城子河組，為特低孔-超低滲儲(chǔ)層。綜合分析表明綏濱坳陷儲(chǔ)集層為較差儲(chǔ)層；研究區(qū)發(fā)育城子河組、穆棱組兩套區(qū)域性蓋層，蓋層類型以泥巖蓋層為主，局部發(fā)育凝灰?guī)r蓋層。泥巖蓋層在宏觀上具有分布范圍廣、橫向連續(xù)性好的特點(diǎn)，微觀上具有孔隙度低、毛細(xì)管力大的特點(diǎn)，綜合評(píng)價(jià)表明泥巖蓋層封蓋能力強(qiáng)，既是研究區(qū)主要的區(qū)域性蓋層，又可作為局部蓋層；凝灰?guī)r蓋層多與泥巖呈互層狀產(chǎn)出，封蓋能力強(qiáng)，為局部蓋層，蓋層發(fā)育具有西部好、東部差的特點(diǎn)。 最后，對(duì)綏濱坳陷生儲(chǔ)蓋組合進(jìn)行了歸納總結(jié)：生儲(chǔ)蓋組合主要分為以下三種類型：自生自儲(chǔ)型、下生上儲(chǔ)型以及上生下儲(chǔ)型。
[Abstract]:The Sanjiang Basin is located in the eastern part of Heilongjiang Province in China. The geotectonic position is located in the compound position of the Mongolia tectonic domain in Central Asia and the western Pacific tectonic belt around the Northeast Asian Rim. Mesozoic and Cenozoic petroliferous basins supplemented by marine and continental transitional facies play an important role in the study of Mesozoic strata in China due to the particularity of their tectonic environment and sedimentary characteristics. Based on the previous research results, this paper makes full use of field outcrop profile, logging, seismic data, through indoor observation, sample analysis and testing, combined with organic geochemistry, thin slice identification and other effective analytical means. The petroleum geological characteristics of Upper Jurassic and Lower Cretaceous strata in Suibin depression in the western part of Sanjiang Basin are studied. The sedimentary characteristics of the main target member of Upper Jurassic and Lower Cretaceous in Suibin Depression are studied. The results show that there are five sedimentary facies in Suibin depression: alluvial fan facies, (fan) delta facies, lacustrine facies, sublacustrine fan facies and marine facies. 13 subfacies, 23 microfacies; In the middle and late Jurassic, extensive transgression occurred in Suibin depression, the sea water intruded from north to south, and a set of strata of Suibin-Dongrong formation, mainly marine sedimentary, were deposited. The strata developed with the characteristics of thick in the north and thin in the south. In the early Cretaceous, the sea water began to withdraw and deposited a set of Chengzihe formation strata with delta facies and shallow lacustrine facies. The sedimentary center and subsidence center were located in the south-west part of the depression. By the middle of the early Cretaceous, the sea water completely retreated and a set of lake-facies Muling formation was deposited. The sedimentation center is still located in the south of the western depression. Secondly, the comprehensive evaluation of source rock, reservoir and caprock in Suibin depression is carried out. The results show that two sets of source rocks are mainly developed in the study area, namely Chengzihe formation and Muling formation. The dark mudstone of Chengzihe formation is a good source rock, and the organic matter type is humus-saprotic mud humus type (鈪

本文編號(hào)：2371051