本文選題：頁(yè)巖 + 五峰組-龍馬溪組��； 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：本文依托于國(guó)家973計(jì)劃“優(yōu)質(zhì)頁(yè)巖氣儲(chǔ)層預(yù)測(cè)及精細(xì)表征”課題,以川東及周緣地區(qū)的五峰組-龍馬溪組海相頁(yè)巖作為本次研究的主要工作對(duì)象。過(guò)去人們普遍認(rèn)為特定層序下的泥頁(yè)巖變化程度較小,因而對(duì)泥頁(yè)巖的巖相研究相對(duì)較少,近幾年來(lái),隨著人們對(duì)頁(yè)巖氣的勘探開發(fā)越來(lái)越重視,尋找良好的可壓性頁(yè)巖氣富集帶成為了泥頁(yè)巖勘探的目標(biāo),而這兩個(gè)因素都與巖相直接相關(guān),因此,本文在對(duì)川東及周緣地區(qū)五峰組-龍馬溪組頁(yè)巖儲(chǔ)層沉積特征進(jìn)行研究的基礎(chǔ)上,對(duì)川東X地區(qū)的頁(yè)巖巖相進(jìn)行了分類,且分析了頁(yè)巖巖相及其控氣性的特征,并對(duì)有利生產(chǎn)的頁(yè)巖巖相進(jìn)行了預(yù)測(cè)。取得的成果和認(rèn)識(shí)如下： (1)對(duì)長(zhǎng)寧雙河、習(xí)水騎龍村、綦江觀音橋三個(gè)野外露頭剖面進(jìn)行了實(shí)地勘測(cè),這三個(gè)野外剖面的五峰組-龍馬溪組地層都沉積了一套富有機(jī)質(zhì)暗色頁(yè)巖,沉積相上可劃分為深水陸棚亞相與淺水陸棚亞相兩類。在此基礎(chǔ)上,選取川東X地區(qū)的6口直井作為沉積序列分析的標(biāo)準(zhǔn)井,運(yùn)用相標(biāo)志模式對(duì)比法,對(duì)6口直井進(jìn)行了單井沉積微相劃分,弄清了X地區(qū)五峰組-龍馬溪組沉積微相在垂向和平面上的分布特征。 (2)建立了川東五峰組-龍馬溪組頁(yè)巖的沉積模式,認(rèn)為川東五峰組-龍馬溪組頁(yè)巖主要受到了構(gòu)造和海平面升降的影響,整個(gè)川東地區(qū)在晚奧陶世到早志留世處在一個(gè)被各隆起所圍限的半滯留隆后深水盆地之中,從而沉積了一套暗色富有機(jī)質(zhì)頁(yè)巖。 (3)在考慮頁(yè)巖的儲(chǔ)氣性與可采性的基礎(chǔ)上,通過(guò)野外露頭、巖心觀察及顯微鏡下分析,根據(jù)泥頁(yè)巖巖性組合和頁(yè)巖有機(jī)質(zhì)與硅質(zhì)的含量,對(duì)川東X地區(qū)五峰組-龍馬溪組海相頁(yè)巖進(jìn)行了巖相的劃分。將X地區(qū)五峰組-龍馬溪組下段頁(yè)巖分為富碳高硅頁(yè)巖相、高碳高硅頁(yè)巖相等19種頁(yè)巖巖相。 (4)在對(duì)頁(yè)巖氣賦存機(jī)理及頁(yè)巖含氣量影響因素進(jìn)行分析研究的基礎(chǔ)上,通過(guò)對(duì)各種巖相頁(yè)巖與其儲(chǔ)層物性、頁(yè)巖含氣量和生產(chǎn)井無(wú)阻流量的對(duì)比統(tǒng)計(jì),可知富碳高硅頁(yè)巖相、高碳高硅頁(yè)巖相為含氣量和產(chǎn)氣量最高的巖相類型,而高碳中硅頁(yè)巖相、高碳中硅含粉砂頁(yè)巖相、高碳中硅粉砂質(zhì)頁(yè)巖相也具有較高的含氣量。
[Abstract]:Based on the national 973 project "Prediction and fine characterization of high-quality shale gas reservoir", the marine shale of Wufeng formation-Longmaxi formation in eastern Sichuan and its surrounding area is taken as the main object of this study. In the past, it was generally believed that the shale under the specific sequence had little change, so the lithofacies of shale was relatively little. In recent years, with the development of shale gas, more and more attention has been paid to the exploration and development of shale gas. Finding a good compressible shale gas enrichment zone has become the target of shale exploration, and both factors are directly related to lithofacies. On the basis of studying the sedimentary characteristics of shale reservoir of Wufeng formation and Longmaxi formation in eastern Sichuan and its surrounding area, this paper classifies the shale lithofacies in X area of eastern Sichuan, and analyses the characteristics of shale lithofacies and its gas-controlling property. The shale facies favorable for production are predicted. The results and perceptions are as follows: 1) three field outcrop sections of Shuanghe River in Changning, Jilongcun in Xishui and Guanyin Bridge in Qijiang have been investigated in the field. The strata of the Wufeng formation and Longmaxi formation in these three field sections have all deposited a set of dark shale rich in organic matter. The sedimentary facies can be divided into deep water shelf subfacies and shallow water shelf subfacies. On this basis, six vertical wells in X area of East Sichuan are selected as standard wells for sedimentary sequence analysis, and six vertical wells are divided into single well sedimentary microfacies by using phase marker pattern correlation method. The distribution characteristics of sedimentary microfacies in vertical and plane of Wufeng formation and Longmaxi formation in X area are clarified. (2) the sedimentary model of the shale of Wufeng formation and Longmaxi formation in eastern Sichuan is established. It is considered that the shale of Wufeng formation and Longmaxi formation in eastern Sichuan is mainly affected by structure and sea level rise and fall. From late Ordovician to early Silurian, the whole area of East Sichuan is in a deep water basin, which is limited by each uplift, and a set of dark organic matter rich shale has been deposited. (3) on the basis of considering the gas storage and recoverability of shale, through field outcrop, core observation and microscope analysis, according to shale lithologic assemblage and shale organic matter and siliceous content, The lithofacies of marine shale of Wufeng formation-Longmaxi formation in X area of East Sichuan are divided. The lower member shale of Wufeng formation and Longmaxi formation in X area is divided into rich carbon and high silicon shale facies, and high carbon high silicon shale is equal to 19 kinds of shale lithofacies. (4) based on the analysis of the mechanism of shale gas occurrence and the influence factors of shale gas content, through the comparative statistics of physical properties of various lithofacies shale and its reservoir, shale gas content and unobstructed flow rate of production wells, it can be seen that the rich carbon and high silicon shale are rich in carbon and high in silicon. The high carbon and high silicon shale facies are the lithofacies with the highest gas content and gas production, while the high carbon medium silicon shale facies, the high carbon medium silicon silty shale facies and the high carbon silty silty shale facies also have higher gas content.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 梁狄剛;郭彤樓;邊立曾;陳建平;趙U，

本文編號(hào)：1799378