發(fā)布時間：2018-02-25 06:32

  本文關(guān)鍵詞： 沉積特征 主控因素 儲層分布 中奧陶統(tǒng) 一間房組 塔中西部地區(qū)　出處：《西南石油大學》2015年碩士論文　論文類型：學位論文

【摘要】：本文通過調(diào)研大量的國內(nèi)外文獻,以碳酸鹽沉積學、古生物學以及碳酸鹽儲層地質(zhì)學等新理論及新方法為指導,采用宏、微觀相結(jié)合的研究方法,在巖心精細觀察描述、薄片鑒定分析的基礎(chǔ)之上,充分利用現(xiàn)場鉆、錄井資料和測井、地震資料,對塔中西部地區(qū)中奧陶統(tǒng)一間房組地層的分布規(guī)律、沉積相主要類型及發(fā)育分布規(guī)律、儲層特征描述、儲層評價、儲層主控因素及儲層預測等方面進行了綜合研究。 通過古生物化石標志分析,發(fā)現(xiàn)塔中西部地區(qū)原良里塔格組地層下部部分為中奧陶統(tǒng)一間房組地層,因此,對該地層的沉積特征和儲層分布研究成為一個亟需解決的問題。在新的地層劃分對比方案的基礎(chǔ)上,對研究區(qū)一間房組地層進行了劃分對比,結(jié)合區(qū)域構(gòu)造特征和地震資料,分析了一間房組地層在平面上的分布情況及厚度變化；綜合分析各種沉積相識別標志,發(fā)現(xiàn)一間房組沉積時期主要為開闊臺地相沉積,包括臺內(nèi)灘、灘間海等亞相,縱向上表現(xiàn)為臺內(nèi)灘與灘間海相互疊置,具有多旋回組合的特點；橫向上臺內(nèi)灘體厚度較大、連續(xù)性好,灘間海亞相發(fā)育相對較少,主要發(fā)育在一間房組地層中下部。 結(jié)合塔中西部地區(qū)中奧陶統(tǒng)一間房組灘體儲層物性特征、儲滲空間類型等多方面詳細分析,認為研究區(qū)一間房組灘體儲層主要為孔洞型儲層,裂縫-孔洞型儲層也較發(fā)育,裂縫型儲層不太發(fā)育,少量洞穴型儲層主要發(fā)育在一間房組頂部。依據(jù)儲層評價標準,對研究區(qū)單井儲層進行評價,發(fā)現(xiàn)儲層主要為Ⅲ類儲層,Ⅰ、Ⅱ類儲層不太發(fā)育,所占比例不高。儲層主要分布在一間房組中上部,橫向連續(xù)性較好,井間可對比,中下部儲層不太發(fā)育。 研究區(qū)儲層的發(fā)育情況受巖性巖相組合、風化殼巖溶作用、埋藏巖溶作用及構(gòu)造斷裂活動等多種因素的控制。其中巖性巖相組合時儲層發(fā)育的物質(zhì)基礎(chǔ),研究區(qū)大面積的灘體沉積有利于儲層的發(fā)育；風化殼巖溶作用是形成優(yōu)質(zhì)儲層的根本原因,形成了大量的溶蝕孔洞、洞穴,儲層最發(fā)育區(qū)位于水平潛流巖溶帶；埋藏巖溶作用改善了先期形成的孔洞和裂縫,極大程度提高了儲層的儲滲性能；裂縫及斷裂提高了儲層的滲流性能,促進了后期巖溶作用的發(fā)育。 綜合多種因素分析,對塔中西部地區(qū)一間房組儲層有利發(fā)育區(qū)進行了預測,發(fā)現(xiàn)：儲層有利發(fā)育主要沿區(qū)斷裂方向發(fā)育,儲層次有利發(fā)育區(qū)分布面積大,較連續(xù),而儲層不利發(fā)育區(qū)主要分布在低能沉積相帶及斷裂欠發(fā)育區(qū)域。這些認識可為研究區(qū)一間房組進一步的勘探和開發(fā)提供地質(zhì)依據(jù)。
[Abstract]:In this paper, a large number of domestic and foreign documents are investigated, and the new theories and methods of carbonate sedimentology, paleontology and carbonate reservoir geology are taken as the guidance, and the macro and micro research methods are adopted to observe and describe the core carefully. On the basis of sheet identification and analysis, using field drilling, logging data, well logging and seismic data, the distribution law of formation, main types of sedimentary facies and their development and distribution in the middle and middle part of the central and western part of the Tarim Basin are studied. Reservoir characteristics description, reservoir evaluation, reservoir control factors and reservoir prediction are comprehensively studied. Based on the analysis of fossil fossil markers, it is found that the lower part of the strata of the former Lianglitag formation in the central and western parts of the Tarim Basin is the Middle Ordovician United Intermediate formation. The study of sedimentary characteristics and reservoir distribution of this formation is an urgent problem to be solved. On the basis of the new stratigraphic division and correlation scheme, the strata of Yijianfang formation in the study area are divided and correlated, combining with the regional structural characteristics and seismic data. This paper analyzes the distribution and thickness change of the strata in the plane of the Yijianfang formation, and synthetically analyzes the identification marks of various sedimentary facies, and finds that the sedimentary period of the Yijianfang formation is mainly composed of the open platform facies, including the subfacies of the platform beach and the interbeach sea, etc. Longitudinally, it is shown that the beach and the intertidal sea overlap each other, which has the characteristics of polycyclic assemblage, and the horizontal inner beach body is thicker and has good continuity, and the subfacies between the beaches are relatively less developed, mainly in the middle and lower part of the strata of the Yijianfang formation. Based on the detailed analysis of the reservoir physical properties and the types of storage and permeability space in the middle and middle Ordovician Intermediate formation in the central and western part of the Tarim Basin, it is considered that the beach body reservoir of the Yijianfang formation in the study area is mainly a porosity type reservoir, and the fracture-pore type reservoir is also relatively developed. The fractured reservoir is not very developed, and a small number of cavernous reservoirs are mainly developed at the top of one chamber formation. According to the reservoir evaluation criteria, the single well reservoir in the study area is evaluated. It is found that the reservoir is mainly type 鈪，

本文編號：1533399