本文選題：龍鳳山構(gòu)造 + 砂體展布　； 參考：《西南石油大學(xué)》2017年碩士論文

【摘要】：作為松遼盆地長嶺斷陷油氣藏勘探開發(fā)的熱點,龍鳳山構(gòu)造低孔、低滲儲層受到重視。該構(gòu)造位于長嶺斷陷長嶺深凹南部,營城組為其主力產(chǎn)氣層系,具有良好的勘探潛力。但儲層物性整體較差,有效儲層段薄,橫向變化大,有效油氣儲層空間展布規(guī)律不清。針對營城組的勘探現(xiàn)狀,在前人研究成果的總結(jié)基礎(chǔ)上,對研究區(qū)目的層段營城組油氣分布規(guī)律進行了系統(tǒng)研究,進一步認識龍鳳山氣田成藏地質(zhì)規(guī)律,實現(xiàn)營城組含氣層段的進一步突破及快速增產(chǎn)。本次研究主要通過區(qū)域地質(zhì)資料、生產(chǎn)動態(tài)資料和測井、錄井資料等進行沉積微相、砂體展布、儲層巖石學(xué)特征、物性特征、成巖作用等研究,結(jié)合油氣藏成藏的基本要素進行分析,了解油氣的分布規(guī)律。在充分認識了構(gòu)造演化特征、沉積背景等基礎(chǔ)上,研究認為該區(qū)主要為扇三角洲沉積、辮狀河三角洲沉積和湖泊相沉積體系,劃分出三角洲平原、三角洲內(nèi)前緣、三角洲外前緣、濱-淺湖以及半深湖幾種亞相,可進一步識別出水下分流河道、辮狀河道、灘壩砂等微相。營Ⅲ-Ⅳ各小層砂體厚度變化大,橫向變化快,縱向上多套砂體疊置,影響油氣的分布。龍鳳山地區(qū)營城組為一套近物源堆積,主要巖石類型為中-細粒的礫巖、砂礫巖和粗砂,粒度較粗,分選較差。填隙物主要有粘土、方解石和硅質(zhì)。通過對巖石薄片的鑒定認為該區(qū)主要的巖石類型有壓實作用、膠結(jié)作用和溶蝕作用,儲層孔隙可劃分為粒間孔、溶蝕孔隙與微孔三種類型,儲層致密低滲,物性變化快、非均質(zhì)性強。營城組和沙河子組沉積有巨厚的暗色泥巖,有機質(zhì)類型好,成熟度高,為研究區(qū)主力烴源巖。營Ⅱ段火山巖與營Ⅲ段泥巖為研究區(qū)兩套穩(wěn)定的蓋層,雙重蓋層的存在是油氣保存的有利條件。圈閉的形成受到了巖性和構(gòu)造的雙重因素控制,為構(gòu)造-巖性氣藏。斷層、構(gòu)造、砂體發(fā)育狀況較好,具有良好的油氣運移聚集條件。綜合以上分析,認為沙河子組厚層烴源巖是基礎(chǔ),油氣富集于生烴中心附近,區(qū)域上控制了天然氣的分布;排烴前東南斜坡的繼承性鼻狀構(gòu)造有利于油氣聚集;三角洲前緣水下分流河道優(yōu)勢相帶控制了優(yōu)質(zhì)儲層的發(fā)育,影響了儲層物性,控制油氣聚集,為其充注和存儲提供了條件;雙重蓋層的存在是油氣藏得以保存的關(guān)鍵因素。
[Abstract]:As a hot spot in exploration and development of oil and gas reservoirs in Changling fault depression of Songliao Basin, low porosity and low permeability reservoirs in Longfengshan structure are paid more attention to. The structure is located in the south of Changling deep depression in Changling fault depression, and Yingcheng formation is the main gas-producing strata, which has good exploration potential. But the physical property of the reservoir is poor, the effective reservoir is thin, the lateral change is large, and the spatial distribution of the effective oil and gas reservoir is unclear. In view of the present exploration situation of Yingcheng formation, on the basis of the summary of previous research results, the oil and gas distribution law of Yingcheng formation in the target zone of the study area is systematically studied, and the reservoir forming geological law of Longfengshan gas field is further understood. To achieve further breakthrough and rapid increase of production in the gas bearing zone of Yingcheng formation. In this study, sedimentary microfacies, sandbody distribution, reservoir petrology, physical properties, diagenesis and so on are studied by means of regional geological data, production dynamic data, logging and logging data. Based on the analysis of the basic elements of oil and gas reservoir formation, the distribution law of oil and gas is understood. On the basis of fully understanding the characteristics of tectonic evolution and sedimentary background, it is considered that the area is mainly composed of fan delta, braided river delta and lacustrine facies sedimentary systems, which can be divided into delta plain and delta front. The subfacies of delta outer front, shore-shallow lake and semi-deep lake can be further identified as subaqueous distributary channel, braided channel, beach bar sand and so on. The thickness of sand bodies in each sub-layer of Ying 鈪，

本文編號：1838611