本文關(guān)鍵詞： 勃利盆地 城子河-穆棱組 石油地質(zhì)特征 烴源巖特征 生儲(chǔ)蓋組合特征　出處：《吉林大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：勃利盆地是黑龍江省東部重要的中生代斷陷盆地,盆地北側(cè)為剝蝕邊界,西南為依蘭~勃利斷裂,南側(cè)為興農(nóng)~興凱斷裂,東南側(cè)為裴德斷裂�；字饕杉涯舅沟貕K和興凱地塊組成,盆地可以分為西部、中部、東部三個(gè)坳陷,地質(zhì)構(gòu)造非常復(fù)雜。本文以勃利盆地東部坳陷區(qū)為主要研究區(qū),以下白堊統(tǒng)城子河組、穆棱組為主要研究目的層段,對(duì)勃利盆地東部坳陷的石油地質(zhì)特征開(kāi)展一系列研究,包括沉積特征、烴源巖特征、儲(chǔ)蓋層特征以及生儲(chǔ)蓋組合特征。通過(guò)野外地質(zhì)調(diào)查和鉆井資料研究,對(duì)勃利盆地東部坳陷下白堊統(tǒng)城子河組、穆棱組進(jìn)行了沉積相劃分,共識(shí)別出(扇)三角洲相、湖泊相、水下扇相3種類(lèi)型,進(jìn)一步識(shí)別出8種沉積亞相和19種沉積微相。城子河組沉積時(shí)期以(扇)三角洲相沉積為主,巖性主要為砂巖,地層中也發(fā)育半深湖相泥巖,沉積中心在勃利盆地勃1井附近。穆棱組沉積時(shí)期湖泊相廣泛發(fā)育,泥巖大面積出露,勃利盆地ZK2、ZK3井附近均以半深湖相沉積為主,為此時(shí)期的沉積中心,湖相發(fā)育過(guò)程中伴隨有水下扇沉積。勃利盆地東部坳陷下白堊統(tǒng)城子河組、穆棱組泥巖分布廣泛,厚度較大,是研究區(qū)下白堊統(tǒng)主要的烴源巖層系,通過(guò)烴源巖有機(jī)地化測(cè)試分析,有機(jī)質(zhì)豐度顯示城子河組、穆棱組為中等烴源巖;有機(jī)質(zhì)類(lèi)型主要以Ⅱ2型為主,也發(fā)育有Ⅱ1型和少量Ⅲ型干酪根;有機(jī)質(zhì)成熟度顯示熱演化程度較高,大部分有機(jī)質(zhì)屬于高成熟-過(guò)成熟階段,說(shuō)明下白堊統(tǒng)城子河組、穆棱組的烴源巖具有較大的生氣潛力,主要以生氣為主,生油為輔。研究區(qū)下白堊統(tǒng)城子河組、穆棱組儲(chǔ)層主要為(扇)三角洲砂體,砂巖類(lèi)型主要是巖屑長(zhǎng)石砂巖,石英含量較低,長(zhǎng)石中斜長(zhǎng)石居多,巖屑主要為沉積巖巖屑及火山巖巖屑,也發(fā)育少量變質(zhì)巖巖屑,填隙物主要為泥質(zhì)雜基,砂巖的結(jié)構(gòu)成熟度和成分成熟度都較低。表明城子河組屬于中成巖階段B期,穆棱組屬于中成巖階段A期。城子河組、穆棱組的孔隙類(lèi)型主要以次生孔隙為主,砂巖的孔隙度、滲透率都較差,為特低、超低孔-超低滲儲(chǔ)層。濱淺湖泥巖在研究區(qū)下白堊統(tǒng)城子河組、穆棱組沉積時(shí)期廣泛發(fā)育,可以作為下白堊統(tǒng)主要的區(qū)域性蓋層,此外,盆地發(fā)育的凝灰?guī)r可以作為局部蓋層。研究區(qū)下白堊統(tǒng)城子河組、穆棱組生儲(chǔ)蓋組合關(guān)系主要有三種類(lèi)型:第一種為自生自儲(chǔ)型,穆棱組泥巖為生油巖,而穆棱組上部砂巖可作為儲(chǔ)層,穆棱組上部泥巖充當(dāng)蓋層,這種組合關(guān)系為區(qū)內(nèi)重要的生儲(chǔ)蓋組合形式;第二種生儲(chǔ)蓋組合關(guān)系為上生下儲(chǔ)型,穆棱組泥巖為生油巖,城子河組砂巖起到儲(chǔ)層的作用,穆棱組泥巖充當(dāng)蓋層;第三種生儲(chǔ)蓋組合關(guān)系為下生上儲(chǔ)型,城子河組泥巖為生油巖,穆棱組砂巖起到儲(chǔ)層的作用,穆棱組泥巖充當(dāng)蓋層。
[Abstract]:The Boli Basin is an important Mesozoic faulted basin in the eastern part of Heilongjiang Province. The north side of the basin is a denudation boundary, the southwest is the Yilan-Boli fault, and the south side is the Xingnong-Xingkai fault. The basement is mainly composed of Jiamusi block and Xingkai block. The basin can be divided into three depressions in the west, middle and east, and the geological structure is very complicated. Following the Cretaceous Chengzihe formation and Muling formation as the main target strata, a series of studies have been carried out on the petroleum geological characteristics of the eastern depression of the Boli Basin, including sedimentary characteristics, source rock characteristics, Based on field geological investigation and drilling data, sedimentary facies of the Lower Cretaceous Chengzihe formation and Muling formation in the eastern depression of the Boli Basin have been divided, and the delta facies and lacustrine facies have been identified. Eight sedimentary subfacies and 19 sedimentary microfacies were further identified by 3 types of underwater fan facies. The sedimentary facies of Chengzihe formation were mainly delta facies, lithology was mainly sandstone, and semi-deep lacustrine mudstone was also developed in the strata. The sedimentary center is near well Bol 1 in Boli Basin. The lacustrine facies developed extensively in Muling formation during the sedimentary period, and mudstone appeared in large area. The semi-deep lacustrine facies was the main sedimentary center in the vicinity of ZK2 and ZK3 well in Burley Basin. In the process of lacustrine facies development, subaqueous fan deposits are associated. The mudstone of the Lower Cretaceous Chengzihe formation and Muling formation in the eastern depression of the Boli Basin are widely distributed and relatively thick, and are the main source rocks of the Lower Cretaceous in the study area. Through organic geochemistry test and analysis of source rocks, the abundance of organic matter shows that Chengzihe formation and Muling formation are medium source rocks, and the organic matter types are mainly type 鈪，

本文編號(hào)：1551654