【摘要】：吉和油田H76斷塊已進(jìn)入高含水開(kāi)發(fā)階段,由于綜合含水率的上升,產(chǎn)量進(jìn)入遞減階段,大量剩余油富集在砂體內(nèi)部。論文以沉積微相研究為基礎(chǔ),查明研究區(qū)的物源方向、搞清砂體的成因及分布規(guī)律,分析砂層的空間疊置關(guān)系,探討不同類(lèi)型的砂層空問(wèn)疊置形式與剩余油的關(guān)系。 論文首先以沉積旋回特征為主要對(duì)比標(biāo)志,結(jié)合前人研究成果,將吉和地區(qū)H76斷塊TⅢ油層組分為9個(gè)小層,在此基礎(chǔ)上對(duì)9個(gè)小層的沉積微相進(jìn)行研究。通過(guò)對(duì)相標(biāo)志的識(shí)別及前人研究成果,認(rèn)為研究區(qū)為近岸水下扇沉積,發(fā)育主水道、水道間、辮狀水道、扇中前緣和辮狀水道間等微相。在確定研究區(qū)沉積背景的基礎(chǔ)上,對(duì)小層沉積微相平面展布特征、垂向演化特征及砂體平面分布特征展開(kāi)研究；通過(guò)建立解釋標(biāo)準(zhǔn),對(duì)研究區(qū)有效砂體進(jìn)行識(shí)別,并從幾何形態(tài)、規(guī)模及側(cè)向連續(xù)性對(duì)有效砂體的平面分布情況進(jìn)行描述。在認(rèn)識(shí)研究區(qū)地層、沉積特征的基礎(chǔ)上,借助儲(chǔ)層構(gòu)型理論,對(duì)切疊的復(fù)合砂層進(jìn)行垂向上的劈分,將其內(nèi)部砂層的空間疊置形式細(xì)分為四種類(lèi)型,并分析每種類(lèi)型的接觸方式與連通關(guān)系。通過(guò)對(duì)砂層幾何形態(tài)、分布樣式、組合關(guān)系的分析,結(jié)合研究區(qū)近岸水下扇的沉積特征來(lái)揭示油水運(yùn)動(dòng)規(guī)律,探討砂層空間疊置形式與剩余油的關(guān)系,提出可能出現(xiàn)的剩余油分布區(qū)域?yàn)檠芯繀^(qū)中部H76-53井～H76-55井及北部H76-64井～H76-86井。剩余油潛在富集區(qū)將成為油田后期開(kāi)采工作的重點(diǎn)研究區(qū)域。
[Abstract]:The fault block H76 in Jihe Oilfield has entered the stage of high water cut development. Due to the increase of comprehensive water cut, the production has entered the stage of decline, and a large amount of remaining oil is enriched in the sand body. Based on the study of sedimentary microfacies, the paper finds out the source direction of the study area, makes clear the origin and distribution law of sand body, analyzes the spatial superposition relation of sand bed, and probes into the relationship between different types of sand layer space overlapping form and remaining oil. Based on the characteristics of sedimentary cycle and previous research results, this paper divides the T 鈪，

本文編號(hào)：2271063