【摘要】：庫車坳陷位于塔里木盆地北緣,北接天山造山帶,地質(zhì)歷史上經(jīng)歷了多期構(gòu)造運(yùn)動,形成了現(xiàn)今三凹四隆的構(gòu)造格局,具有南北分帶,東西分段的特點(diǎn)。庫車坳陷克拉2氣田資源量超千億立方米,石油、天然氣、煤等常規(guī)能源礦產(chǎn)十分富集,非常規(guī)能源礦產(chǎn)如頁巖氣、致密砂巖氣、煤層氣以及油砂等,在坳陷中也具有非常可觀的資源量。各種單一能源礦產(chǎn)的富集成藏研究表明,它們不僅在時(shí)空分布復(fù)雜有序,在成藏的過程中也相互影響。平面上,坳陷形成南油北氣,東部濕氣西部干氣的特點(diǎn)。石油主要分布在南部斜坡帶上;天然氣分布在北部克依構(gòu)造帶和秋里塔格構(gòu)造帶東部,南部斜坡帶存在凝析氣;煤和煤層氣主要分布在庫拜煤田和陽霞地區(qū);油砂分布在天山山前帶;致密砂巖氣分布在拜城凹陷和陽霞凹陷穩(wěn)定構(gòu)造帶上;頁巖氣分布在北部克依構(gòu)造帶淺層。烴源巖層位是三疊系和侏羅系,沉積厚度大,以Ⅱ2和Ⅲ型為主,有機(jī)質(zhì)豐度高,成熟度高,現(xiàn)今以生氣為主;縱向上,白堊系、古近系為主要儲層,侏羅系、新近系為次要儲層;古近系和新近系兩套膏鹽層是優(yōu)越的區(qū)域性蓋層,形成多套儲蓋體系,是該區(qū)大中型氣田得以保存的前提;斷層的發(fā)育溝通了烴源巖和儲層。侏羅系和三疊系地層的烴源巖熱演化是該區(qū)能源礦產(chǎn)的形成、分布、組合共生的基礎(chǔ)。本文通過收集前人的地層巖性及比例、孔隙度、滲透率、熱導(dǎo)率、大地?zé)崃�、地溫梯度等�?shù)據(jù),在庫車坳陷西、中、東部三條地震剖面上各布置1口人工單井,利用盆地模擬的技術(shù)方法,進(jìn)行埋藏史、生烴史等的模擬研究可知,中段、西段、東段分別在130、125、110Ma熱程度度達(dá)到0.5%,現(xiàn)今熱成熟度中西部較高,Ro大于2.0%,進(jìn)入干氣生成階段,東部較低,Ro在1.0~2.0%以濕氣生成為主。以生烴演化為基礎(chǔ),結(jié)合相關(guān)地質(zhì)條件,進(jìn)行多種能源在時(shí)空富集的關(guān)聯(lián)性研究,并對庫車劃分為北部多種能源礦產(chǎn)發(fā)育帶、中部多種能源礦產(chǎn)發(fā)育帶以及南部多種能源礦產(chǎn)發(fā)育帶,以期為將來該區(qū)的能源勘探提供理論知識上的借鑒。
[Abstract]:Kuqa depression is located in the northern margin of Tarim Basin and is connected with Tianshan orogenic belt to the north. It has undergone many tectonic movements in geological history and formed the present structural pattern of three concave and four uplift with the characteristics of dividing the north and the south and dividing the east and the west. Kela 2 gas field in Kuqa depression has a resource of more than 100 billion cubic meters. Conventional energy minerals such as oil, natural gas and coal are very rich. Unconventional energy minerals such as shale gas, tight sandstone gas, coalbed methane and oil sand, etc. There are also considerable resources in the depression. The studies of rich and integrated reservoirs of various single energy minerals show that they not only have complex and orderly distribution in time and space, but also interact with each other in the process of reservoir formation. On the plane, the depression forms the north gas of south oil and the dry gas of the west of east wet gas. Oil mainly distributes in the southern slope belt, natural gas distributes in the east of Keyi structural belt and Qiulitag structural belt in the north, condensate gas exists in the southern slope zone, coal and coalbed methane mainly distributes in Kuba coalfield and Yangxia area. The oil sand is distributed in the Tianshan mountain front belt, the tight sandstone gas is distributed in the stable structural belt of Baicheng depression and Yangxia depression, and the shale gas is distributed in the shallow layer of the Keyi structural belt in the north. The source rocks are Triassic and Jurassic, with large sedimentary thickness, mainly type 鈪，

本文編號：2226832