本文關(guān)鍵詞： 四川盆地 龍王廟組 碳酸鹽緩坡 顆粒灘白云巖儲層 儲層成因和分布　出處：《天然氣地球科學(xué)》2017年08期 　論文類型：期刊論文

【摘要】：寒武系龍王廟組白云巖已經(jīng)成為四川盆地非常重要的天然氣勘探領(lǐng)域,并在高石梯—磨溪地區(qū)發(fā)現(xiàn)了萬億方儲量規(guī)模的大氣藏,但對儲層成因和分布規(guī)律認(rèn)識不清已經(jīng)成為制約龍王廟組白云巖勘探的瓶頸�；诼额^地質(zhì)調(diào)查、巖心和薄片觀察、儲層地球化學(xué)特征及儲層模擬實驗,對這套白云巖儲層的特征、成因和分布規(guī)律做了深入的研究,取得2項認(rèn)識:一是四川盆地寒武系龍王廟組可劃分為上、下2段,編制了以段為單元的巖相古地理圖2張,建立了碳酸鹽巖緩坡沉積模式,顆粒灘主要分布于上段的淺緩坡;二是顆粒灘是龍王廟組白云巖儲層發(fā)育的基礎(chǔ),同生溶蝕作用是龍王廟組顆粒灘儲層孔隙發(fā)育的關(guān)鍵,受暴露面控制,埋藏期溶蝕孔洞不但有規(guī)模,而且主要沿同生期的孔隙帶發(fā)育,具繼承性,分布有規(guī)律可預(yù)測。龍王廟組白云巖儲層成因地質(zhì)認(rèn)識揭示儲層的發(fā)育不僅限于高石梯—磨溪構(gòu)造表生巖溶發(fā)育區(qū),全盆地廣布的顆粒灘相沉積都是潛在的勘探對象。
[Abstract]:The dolomite of Cambrian Longwangmiao formation has become a very important field of natural gas exploration in Sichuan Basin, and an atmospheric reservoir of one trillion square reserves has been discovered in Gaoshiti-Moxi area. However, unclear understanding of reservoir genesis and distribution law has become the bottleneck of dolomite exploration in Longwangmiao formation. Based on outcrop geological survey, core and slice observation, reservoir geochemical characteristics and reservoir simulation experiments. The characteristics, genesis and distribution of this set of dolomite reservoir have been deeply studied, and two understandings have been obtained: one is that the Cambrian Longwangmiao formation in Sichuan Basin can be divided into upper and lower sections. Two lithofacies paleogeographic maps are compiled, and carbonate gentle slope sedimentary model is established. Granular beach is mainly distributed in shallow gentle slope of upper member. Second, granular beach is the basis of dolomite reservoir development in Longwangmiao formation, and syngenic dissolution is the key to pore development of grain beach reservoir in Longwangmiao formation, which is controlled by exposed surface and has not only large scale in burial period. And mainly along the syngenetic pore zone development, with inheritance. The genetic geological understanding of dolomite reservoir in Longwangmiao formation reveals that the reservoir development is not limited to the Gaoshititian-Moxi structural epigenetic karst development area. The widely distributed granular beach facies deposits throughout the basin are potential targets for exploration.
【作者單位】： 中國石油杭州地質(zhì)研究院;中國石油集團(tuán)碳酸鹽巖儲層重點實驗室;中國地質(zhì)大學(xué)(北京)地球科學(xué)與資源學(xué)院;
【基金】：國家科技重大專項(編號:2016ZX05004-002) 中國石油天然氣股份有限公司重大科技專項“深層油氣勘探開發(fā)關(guān)鍵技術(shù)研究”(編號:2014E-32)聯(lián)合資助
【分類號】：P618.13
【正文快照】： 3.中國地質(zhì)大學(xué)(北京)地球科學(xué)與資源學(xué)院,北京100083)等.四川盆地下寒武統(tǒng)龍王廟組沉積相與儲層分布預(yù)測研究[J].天然氣地球科學(xué),2017,28(8):1176-1190.]0引言寒武系是四川盆地天然氣勘探的重要領(lǐng)域,但近50年來,寒武系長期處在主探層系震旦系燈影組氣藏過程中的兼探地位。遵

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