【摘要】：遼河油田歡喜嶺轄區(qū)杜813區(qū)塊原油地質儲量大,原油流體性質具有“四高一低”的特點:即,高密度、高粘度、高凝固點、高瀝青+膠質和低含蠟量。從2002年開始對歡喜嶺轄區(qū)杜813區(qū)塊有計劃的開采,經(jīng)歷了蒸汽吞吐、蒸汽驅以及SAGD技術等采油工藝,但油井產出逐年遞減。其原因主要是由于杜813南塊油藏內部非均質性強,流體可流動性差,導致低效井多,動用程度較低,剩余儲量較大,開采效益差。因此迫切需要對本地區(qū)的層序、構造、儲層和油水分布等進行精細剖析,以指導油田下步的油氣開發(fā)調整工作。本文采用油藏描述技術,對歡喜嶺油田的杜813區(qū)塊油藏進行精細剖析,通過層序地層學、沉積相等理論對杜813南區(qū)塊油層小層進行詳細劃分與對比。在小層劃分與對比的基礎上,對研究區(qū)油藏構造、儲層條件和原油流體物性等進行研究。結合研究區(qū)油井生產方式以及影響產能的因素,最終對杜813區(qū)塊油藏儲量評估進行重新認識,確定開采潛力區(qū)域并建議部署水平井2口。通過研究主要取得以下認識:(1)在標志層控制下,按照層序地層學分層原則,將杜813南塊興隆臺油層自上而上分為4個油層組:興Ⅰ、興Ⅱ、興Ⅲ、興Ⅳ和7個砂巖組;(2)杜813南塊油層埋藏淺、地層壓實作用弱、膠結差、儲層物性較好,屬高孔隙度、高滲透率儲層;(3)杜813南塊興隆臺油層Ⅳ組為水下扇重力流沉積模式,興Ⅰ~Ⅴ組為湖盆邊緣淺水扇三角洲沉積模式,分別發(fā)育辮狀分流河道微相、分流河口砂壩微相、分流間薄層砂微相和邊、心灘微相、分流間洼地等沉積微相類型;(4)確定杜813南塊屬于薄互層狀超稠油底水油藏;(5)重新確定杜813區(qū)塊的含油面積、有效厚度、孔隙度和含油飽和度等參數(shù),并對其儲量進行重新評估;(6)提出了2口有利井位的部署建議,為此區(qū)塊進一步開發(fā),完善井網(wǎng),改善注采關系提供了資料基礎。
[Abstract]:Block Du813 of Huanxiling area in Liaohe Oilfield has large oil reserves and the characteristics of crude oil fluid are "four high and one low": high density, high viscosity, high freezing point, high pitch resin and low wax content. Since 2002, the planned production of Du813 block in Huanxiling district has experienced steam huff and puff, steam drive and SAGD technology, but the oil well output is decreasing year by year. This is mainly due to the strong internal heterogeneity and poor fluidity of fluid in the reservoir of Dus813 block, which leads to the low efficiency wells, low production degree, large remaining reserves and poor recovery efficiency. Therefore, it is urgent to analyze the sequence, structure, reservoir and distribution of oil and water in this area so as to guide the oil and gas development and adjustment in the next step. In this paper, the reservoir description technique is used to analyze the reservoir of Du813 block in Huanxiling Oilfield, and through sequence stratigraphy and sedimentary equality theory, the sub-layers of Du813 block are divided and contrasted in detail. On the basis of stratification and correlation, the reservoir structure, reservoir conditions and physical properties of crude oil in the study area are studied. Combined with the production mode of oil wells in the study area and the factors affecting productivity, the reservoir reserves evaluation in Block du 813 was reunderstood, the potential area of production was determined and two horizontal wells were proposed to be deployed. The main results are as follows: (1) according to the principle of sequence stratigraphy, the Xinglongtai reservoir in Dun813 block is divided into four reservoirs: Xing 鈪，

本文編號：2183356