【摘要】：羅場向斜位于四川盆地南緣,主要目的層五峰組-龍馬溪組頁巖在歷經(jīng)印支、燕山、喜馬拉雅等多期造山事件改造后,頁巖變形相對較弱、埋藏適中,頁巖氣形成與保存條件良好,成為上揚(yáng)子頁巖氣核心區(qū)的重要組成部分。據(jù)巖性、電性、礦物組成、有機(jī)質(zhì)賦存及含氣性特征分析,本套頁巖地層可劃分為3個三級層序、3個巖性段、3種沉積相及4種沉積亞相與多種沉積微相;總體以深水陸棚相沉積期發(fā)育的富有機(jī)質(zhì)頁巖段(Ⅰ層)含氣性最好,并可細(xì)分為Ⅰ_1,Ⅰ_2,Ⅰ_3,Ⅰ_4,Ⅰ_5 5個小層。綜合向斜內(nèi)黃金壩建產(chǎn)區(qū)頁巖物性與壓力系數(shù)特征分析,昭通示范區(qū)頁巖氣主要賦存于現(xiàn)今殘留的深水陸棚相復(fù)向斜內(nèi),氣藏以觀音橋段灰?guī)r分隔為龍馬溪組底部與五峰組兩套,結(jié)合壓后評估與單井試采成果,評價認(rèn)為建產(chǎn)區(qū)以龍馬溪組底部Ⅰ_3與Ⅰ_4小層壓后改造與采氣效果最好。
[Abstract]:The Luochang syncline is located in the southern margin of Sichuan basin. The shale of the Wufeng formation and Longmaxi formation, the main target layer, underwent several orogenic events, such as Indosinian, Yanshanian and Himalayan orogenic events, and the shale deformation was relatively weak and the burial was moderate. Shale gas formation and preservation conditions are good, and become an important part of upper Yangtze shale gas core area. According to the analysis of lithology, electricity, mineral composition, occurrence of organic matter and gas-bearing characteristics, the shale strata can be divided into three third-order sequences, three sedimentary facies, four sedimentary subfacies and several sedimentary microfacies in three lithologic member. In general, the oil-rich shale formation (layer 鈪，

本文編號：2238999