本文選題：震旦系　切入點(diǎn)：微生物　出處：《東北石油大學(xué)學(xué)報(bào)》2016年02期 　論文類型：期刊論文

【摘要】：為明確四川盆地震旦系燈影組的儲(chǔ)層特征及成因,以鉆井巖心、薄片觀察、掃描電鏡和碳氧穩(wěn)定同位素分析等資料為基礎(chǔ),分析研究區(qū)儲(chǔ)層的儲(chǔ)集空間類型及儲(chǔ)層特征、成因。結(jié)果表明:燈影組儲(chǔ)集巖類以凝塊狀云巖、砂屑云巖為主,儲(chǔ)集空間以次生孔隙、溶蝕孔洞為特征;沉積相是儲(chǔ)層的物質(zhì)基礎(chǔ),藻丘和顆粒灘亞相控制儲(chǔ)層在平面上的分布范圍和規(guī)模;溶蝕是儲(chǔ)層形成的關(guān)鍵,同生期溶蝕增加儲(chǔ)層的比表面積,為后期巖溶提供有利的物性條件;表生期溶蝕控制優(yōu)質(zhì)儲(chǔ)層在縱向上的分布,主要分布在距離不整合面100m以內(nèi);埋藏期溶蝕對(duì)儲(chǔ)層總孔隙度改變不大,但使前期較分散的儲(chǔ)層趨于富集。早期裂縫(第一~三期)為各期流體及烴類充注提供導(dǎo)引作用,晚期裂縫(第四~五期)改善燈影組儲(chǔ)層的滲透能力。該結(jié)果對(duì)研究區(qū)氣田的勘探和開發(fā)具有參考意義。
[Abstract]:In order to clarify the reservoir characteristics and genesis of the Dengying formation of the Sinian system in Sichuan Basin, the reservoir space types and reservoir characteristics of the studied area are analyzed on the basis of drilling core, thin slice observation, scanning electron microscope and carbon and oxygen stable isotope analysis. The results show that the reservoir rocks of Dengying formation are condensed block dolomite, sand dolomite is dominant, reservoir space is characterized by secondary pores and dissolved pores, and sedimentary facies are the material basis of reservoir. The distribution range and scale of the reservoir are controlled by algal dune and granular shoal subfacies, dissolution is the key of reservoir formation, and the syngenic dissolution increases the specific surface area of the reservoir, which provides favorable physical properties for the later karst. Supergene dissolution controls the vertical distribution of high quality reservoir, mainly within 100m from unconformity surface, and the total porosity of reservoir is not changed by dissolution in burial period. The early fractures (the first to the third stage) provide guidance for fluid and hydrocarbon filling in each stage, but the early dispersed reservoirs tend to be enriched, and the early fractures (the first to the third stage) provide guidance for the filling of fluids and hydrocarbons in each stage. The late fractures (4th ~ 5) improve the permeability of the reservoir in Dengying formation. The results are of reference significance for the exploration and development of gas fields in the study area.
【作者單位】： 中國(guó)石油西南油氣田分公司勘探開發(fā)研究院;四川路橋礦業(yè)投資開發(fā)有限公司;
【基金】：國(guó)家科技重大專項(xiàng)(2011ZX05004-005) 中國(guó)石油天然氣股份有限公司重大科技專項(xiàng)(2013E-050208)
【分類號(hào)】：P618.13

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本文編號(hào)：1590131