本文關(guān)鍵詞：川西坳陷東坡沙溪廟組成藏過程研究　出處：《長(zhǎng)江大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 川西坳陷東坡 沙溪廟組 成藏動(dòng)力 成藏模式 成藏控制因素

【摘要】：川西坳陷是位于四川盆地中西部的前陸盆地,川西坳陷東坡涉及北東東向孝泉-新場(chǎng)-豐谷構(gòu)造帶、南北向知新場(chǎng)—龍寶梁構(gòu)造帶和中江斜坡帶三個(gè)構(gòu)造區(qū)帶,中侏羅統(tǒng)沙溪廟組為主要含油氣層系之一。川西坳陷東坡地區(qū)天然氣資源豐富,是油氣勘探的熱點(diǎn)地區(qū)。在充分吸收前人相關(guān)研究成果的基礎(chǔ)上,以天然氣成藏機(jī)理和成藏動(dòng)力學(xué)原理為指導(dǎo),應(yīng)用試氣、油氣顯示、錄井、測(cè)井解釋等資料,厘清了川西坳陷東坡沙溪廟組的氣水分布特征;應(yīng)用油氣動(dòng)態(tài)成藏恢復(fù)等技術(shù)和方法,結(jié)合輸導(dǎo)體系特征和運(yùn)移模擬結(jié)果,通過成藏動(dòng)力分析及典型氣藏解剖,揭示川西坳陷東坡不同構(gòu)造位置、不同斷-砂配置條件下油氣運(yùn)聚過程及成藏演化的差異性,開展氣藏成藏主控因素及富集規(guī)律研究,指出川西坳陷東坡沙溪廟組有利目標(biāo)區(qū),為沙溪廟組油氣勘探部署提供理論依據(jù)和技術(shù)支撐。根據(jù)烴源巖生烴演化史和流體包裹體分析結(jié)果,沙溪廟組儲(chǔ)層主要有3個(gè)成藏期,大致在141~68 Ma:第一期成藏要在141~128Ma(J3~K1),第二期成藏主要發(fā)生在105~88Ma(K1~K2),第三期成藏主要在83~68Ma(K2)。對(duì)研究區(qū)典型氣藏進(jìn)行解剖,高廟子地區(qū)和中江-回龍地區(qū)主要以氣層、含氣層為主,同時(shí)含有一定量的氣水同層。分析地層水分布特征可知沙溪廟組天然氣和地層水由烴源斷層附近向構(gòu)造遠(yuǎn)端逐步侵入的過程,存在來自深部須家河組地層水沿?cái)鄬油ǖ老蛏线\(yùn)移滲入,從而驅(qū)逐地層中原生水的成藏過程。在剝蝕恢復(fù)和構(gòu)造演化分析的基礎(chǔ)上,分析天然氣從成藏關(guān)鍵時(shí)刻到喜山期調(diào)整的動(dòng)態(tài)成藏過程,建立川西坳陷東坡沙溪廟組氣藏動(dòng)態(tài)成藏演化模式3個(gè),分別為:(1)高廟子地區(qū)成藏模式:氣體在異常高壓下沿?cái)鄬酉蛏线\(yùn)移,遇到斷砂匹配好的優(yōu)質(zhì)儲(chǔ)層則向構(gòu)造高點(diǎn)側(cè)向運(yùn)移;喜山運(yùn)動(dòng)使氣體再次調(diào)整運(yùn)移方向。(2)中江下沙溪廟成藏模式:中江古構(gòu)造存在平緩微構(gòu)造,氣體在異常高壓的作用下沿?zé)N源斷層向斷層上盤儲(chǔ)集物性好的砂體充注,喜山運(yùn)動(dòng)導(dǎo)致斷層與儲(chǔ)層上傾方向相接,儲(chǔ)層內(nèi)部非均質(zhì)性嚴(yán)重,導(dǎo)致砂體封閉,形成香腸式結(jié)構(gòu)。(3)中江上沙溪廟成藏模式:天然氣在異常高壓的作用下沿?cái)鄬酉蛏线\(yùn)移,遇到斷砂匹配好的優(yōu)質(zhì)儲(chǔ)層則向構(gòu)造高點(diǎn)進(jìn)行側(cè)向運(yùn)移,但由于斷層規(guī)模較大,與之相鄰砂體形成含水帶;喜山運(yùn)動(dòng)使氣體再次調(diào)整運(yùn)移方向。沙溪廟組天然氣成藏4個(gè)控制因素分別為“斷砂控運(yùn),儲(chǔ)層控藏,構(gòu)造控向,演化控調(diào)”。主要選取7種條件制定研究區(qū)天然氣富集區(qū)評(píng)價(jià)體系,依據(jù)評(píng)價(jià)體系,研究區(qū)共有Ⅰ、Ⅱ、Ⅲ類天然氣富集區(qū)。沙一段與沙二段有利區(qū)分布相似,都是靠近烴源斷層地區(qū)主要發(fā)育Ⅰ、Ⅱ類有利區(qū),遠(yuǎn)源地區(qū)主要發(fā)育Ⅲ類有利區(qū)。沙三段主要發(fā)育Ⅰ、Ⅱ類有利區(qū)。高廟JS24-2北部河道;中江JS31-2(3)號(hào)河道;中江JS33-3(4)號(hào)河道為本次研究的三條有利目標(biāo)河道。
[Abstract]:The West Sichuan depression is a foreland basin is located in the western Sichuan basin, east to nee Xiaoquan Xinchang Fenggu tectonic belt in Western Sichuan depression, North and south to know with three tectonic Xinchang - Long Baoliang tectonic belt and Zhongjiang slope belt, Middle Jurassic Shaxi Temple group is one of the main oil-bearing series. Natural West Sichuan depression rich gas resources in Dongpo area, is a hot area for oil and gas exploration. Based on absorbing the previous related research results, using natural gas accumulation mechanism and accumulation dynamics principle, application of gas, oil and gas, logging, well logging interpretation data, to clarify the West Sichuan Depression gas water distribution characteristics of Dongpo Shaxi Temple group; application of oil and gas accumulation dynamic recovery technology and method, combined with the characteristics of conducting system and transport simulation results, through the accumulation of power analysis and typical gas reservoir, reveals the West Sichuan Depression Dongpo different tectonic positions, different Sand fault configuration under the condition of hydrocarbon migration and accumulation in different evolution, development and enrichment of the gas accumulation controlling factors, pointed out that the Shaxi Dongpo Temple group favorable target area of Western Sichuan depression, provide theoretical basis and technical support for the deployment of the Shaxi Temple group of oil and gas exploration. According to the history and fluid inclusion the analysis results of hydrocarbon generation evolution, the main Shaxi Temple of the reservoir has 3 accumulation periods roughly in the 141~68 Ma: the first period accumulation in 141~128Ma (J3~K1), the second accumulation mainly occurred in 105~88Ma (K1~K2), the third accumulation mainly in 83~68Ma (K2). The anatomy of typical gas the study area reservoir, Gaomiaozi area and Zhongjiang area mainly in Huilong reservoir, gas bearing layer, but also contains a certain quantity of gas and water in the same layer. The analysis process of formation water distribution characteristics of the Shaxi Temple group of natural gas and formation water from a nearby source fault tectonic intrusive distal gradually, From the deep Xujiahe formation water infiltration upward migration along the fault channel, thus forming the Central Plains Water expulsion formation process. On the basis of erosion restoration and tectonic evolution analysis, analysis of natural gas from the reservoir to the critical moment dynamic Himalaya stage accumulation process, the construction of West Depression Dongpo Lichuan Shaxi Temple group gas reservoir reservoir dynamic evolution model 3, respectively: (1) accumulation model of Gaomiaozi area: gas under abnormal high pressure in the upward migration along faults, reservoir sand, meet quality is good to the structural high lateral migration; the Himalayan movement made the gas migration direction adjust again. (2) Shaxi Zhongjiang Temple Reservoir Model: Nakae Ko structure are flat micro structure, gas to the hanging wall of the fault reservoir well sand filling along the source fault in abnormal pressure under the action of the Himalayan movement caused by fault and reservoir updip direction is non reservoir The heterogeneity is serious, resulting in the formation of sand body sealing, sausage type structure. (3) reservoir model of Shaxi temple into Zhongjiang: natural gas in abnormal pressure under the action of the upward migration along faults, reservoir sand quality encountered a good match to the structural highs of lateral migration, but due to the fault of large-scale formation, including the water and the adjacent sand body; the Himalayan movement made the adjustment again. Gas migration direction of natural gas accumulation in Shaxi Temple group 4 control factors were "broken sand control, reservoir reservoir control, structure control, evolution control. Mainly selected 7 kinds of conditions to develop the study area of natural gas reserves evaluation system on the basis of the evaluation system, the study area, a total of I, II, III type of natural gas enrichment area. Es1 and Sha two section in favorable areas are similar, are close to the source fault area mainly developed favorable area I, class II, class III far source area mainly developed in this area. The main development of Sha three section II. Favorable area. North of JS24-2 River Zhongjiang Gaomiao; JS31-2 (3), Zhongjiang River; JS33-3 (4) No. three favorable target of river river in this study.

【學(xué)位授予單位】：長(zhǎng)江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.13

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