本文關(guān)鍵詞： 準(zhǔn)噶爾盆地 沙灣組 水下沉積 儲(chǔ)層非均質(zhì)性　出處：《長(zhǎng)江大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：春風(fēng)油田為勝利油田于2011年在準(zhǔn)噶爾盆地車排子地區(qū)新近系沙灣組取得的重大勘探成果,由于該油田勘探開發(fā)歷史短、程度較低,導(dǎo)致沙灣組砂層組界限不明確,構(gòu)造特征有待進(jìn)一步落實(shí);沉積類型不清楚,缺乏針對(duì)沉積微相的系統(tǒng)研究;儲(chǔ)層物性縱橫向變化快,非均質(zhì)性較強(qiáng);油藏類型及分布多樣,成藏主控因素不明確。以上這些問題嚴(yán)重制約著油田下部勘探開發(fā)的部署。本文在前人研究的基礎(chǔ)上,綜合利用巖心、測(cè)井、地震及分析化驗(yàn)等資料,重新落實(shí)了沙灣組的砂層組界限,校正了原有的構(gòu)造特征,明確了沉積微相類型及其分布,定量表征了儲(chǔ)層非均質(zhì)性,闡明了原油成藏的主控因素。通過本次研究共取得了以下認(rèn)識(shí):(1)沙灣組沉積時(shí)研究區(qū)整體為一北西高、東南低的單斜,中部存在一條進(jìn)南北向帶狀展布的古隆起。(2)巖石的巖性、顏色、沉積構(gòu)造、微量元素及地震同相軸的穩(wěn)定性均表明沙灣組一段1砂組為典型的水下沉積,具有雙物源交匯的沉積特征,共劃分出2種沉積環(huán)境下的6種沉積微相,并刻畫了其分布特征,明確了灘壩沉積的范圍。(3)將巖心上的旋回特征標(biāo)定在測(cè)井上,刻畫了1砂組內(nèi)部沉積的4個(gè)次級(jí)旋回,明確了自下而上各旋回內(nèi)砂體的厚度及平面分布范圍逐漸變小,類似于水進(jìn)環(huán)境下的沉積,但是砂體的物性變化與旋回性耦合較差。(4)儲(chǔ)層的微觀特征顯示儲(chǔ)層鈣質(zhì)膠結(jié)強(qiáng)烈,初級(jí)空間主要為殘余粒間孔,吼道的連通性較好。(5)研究區(qū)西部、西北部與中部?jī)?chǔ)層非均質(zhì)性強(qiáng)烈,而造成這種現(xiàn)象是構(gòu)造、沉積與成巖三因素的共同影響,古隆起區(qū)、水動(dòng)力變化較強(qiáng)的扇三角洲前緣水下分流河道以及鈣質(zhì)膠結(jié)強(qiáng)烈的地區(qū)儲(chǔ)層非均質(zhì)性強(qiáng)烈。
[Abstract]:Chunfeng Oilfield is a major exploration achievement of Shengli Oilfield in 2011 in Chepaizi area, Junggar Basin. Because of its short history of exploration and development, its degree is low. As a result, the boundary of sand formation in Shawan formation is not clear, and the structural characteristics need to be further implemented. The type of sedimentary is not clear and there is no systematic research on sedimentary microfacies. The reservoir physical properties change rapidly in the vertical and horizontal directions, and the heterogeneity is strong; The reservoir types and distribution are various, and the main controlling factors of reservoir formation are not clear. These problems seriously restrict the deployment of exploration and development in the lower part of the oilfield. Based on the previous studies, this paper comprehensively utilizes core and logging. The seismic and analytical data re-implement the sand formation boundary of Shawan formation, correct the original structural characteristics, define the type and distribution of sedimentary microfacies, and quantitatively characterize the reservoir heterogeneity. The main controlling factors of crude oil accumulation are clarified. Through this study, we have obtained the following understanding: 1) the sedimentary area of Shawan formation is a monoclinic with high north and west and low southeast. The lithology, color, sedimentary structure, trace elements and the stability of seismic cofacies axis of a paleouplift in the middle of Shawan formation indicate that the first member of Shawan formation is a typical underwater deposit. There are six sedimentary microfacies in two sedimentary environments and their distribution characteristics are described. The range of beach and dam sedimentation is defined. (3) the cyclic characteristics of the core are calibrated on the log, and the four secondary cycles of the internal deposition of the sand group 1 are described. It is clear that the thickness and plane distribution range of sand bodies in each cycle from bottom to top gradually become smaller, which is similar to the deposition in the environment of water entry. However, the microcosmic characteristics of sand bodies with poor coupling between physical properties and cyclicity show that the calcareous cementation of reservoirs is strong, the primary space is mainly residual intergranular pores, and the connectivity of the roar channel is better in the western part of the study area. The heterogeneity of the reservoir in the northwest and central regions is very strong, and this phenomenon is caused by the combined influence of three factors: structure, sedimentation and diagenesis, and the paleouplift area. The strong hydrodynamic variation of fan delta front underwater distributary channel and the strong calcareous cementation area reservoir heterogeneity is strong.
【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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本文編號(hào)：1476399