本文關(guān)鍵詞： 儲層預(yù)測 地震反演 元素分析 沉積微相分析　出處：《西南石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：潿洲6-8油田是南海北部灣盆地海域內(nèi)已實施開發(fā)的海上油田,目前潿洲6-8油田已鉆探WZ6-8-1井、WZ6-8-2井、WZ6-8-3井三口探井,同時針對流一段四油組側(cè)鉆WZ6-8-A3H井、WZ6-8-A3H1兩口水平開發(fā)井。其中2口水平井均鉆遇多個孤立巖性砂體,砂體連通性差,油層分布不連續(xù),儲量規(guī)模不大,與鉆前認(rèn)為的砂體、油層連續(xù)分布的認(rèn)識相差較大。因此,儲層的平面展布特征、橫向連通性及有利儲層分布區(qū)需重新認(rèn)識和評價。目前,該區(qū)鉆后儲層研究工作存在三大難點：1、儲層非均質(zhì)性較強,連續(xù)性差；2、儲層邊界波阻抗差異較小,儲層邊界難以界定；3、儲層厚度小,砂體尖滅和泥巖隔層相間,受地震波分辨率影響明顯。 針對上述問題,本文通過對研究區(qū)古構(gòu)造、沉積厚度、地震剖面特征分析,結(jié)合砂巖成分、重礦物等其他資料,運用儲層精細(xì)對比、儲層非均質(zhì)性評價、儲層砂體預(yù)測、沉積微相分析等手段,綜合分析得出：潿洲6-8油田流一段四油組砂巖儲層的物源主要來自北東向兩支曲流河,本次新發(fā)現(xiàn)的南北曲流河水道在河床最深切的部位,砂巖儲集體富集,同時又位于T8l泥巖、頁巖及油頁巖生油層之上,水道頂部被間灣泥巖覆蓋,能形成獨立的巖性圈閉,可能蘊藏油氣形成油氣藏,值得進一步盤活勘探。
[Abstract]:Weizhou 6-8 oilfield is an offshore oil field that has been developed in the Beibu Gulf basin of the South China Sea. At present, Weizhou 6-8 oilfield has drilled three exploration wells of WZ6-8-1 well WZ6-8-2 well and well WZ6-8-3. At the same time, two horizontal development wells WZ6-8-A3H1 were drilled on the side of WZ6-8-A3H well in the fourth oil formation of Liu 1 formation. Among them, two horizontal wells were drilled with several isolated lithologic sand bodies, the sand body connectivity was poor, the reservoir distribution was not continuous, and the reserve scale was not large, which was similar to the sand body considered before drilling. Therefore, the horizontal distribution characteristics, lateral connectivity and favorable reservoir distribution areas need to be re-recognized and evaluated. In this area, there are three major difficulties in reservoir research after drilling: 1, strong heterogeneity of reservoir, poor continuity, small difference in wave impedance of reservoir boundary, difficulty in defining reservoir boundary, small reservoir thickness, sand body pinching and mudstone interphase, etc. It is obviously affected by the resolution of seismic wave. In view of the above problems, through the analysis of paleotectonics, sedimentary thickness, seismic profile characteristics, combined with other data such as sandstone composition, heavy minerals and so on, this paper applies fine correlation of reservoir, evaluation of reservoir heterogeneity, prediction of reservoir sand body, etc. By means of sedimentary microfacies analysis and other means, it is concluded that the source of sandstone reservoir of the fourth formation of Liu 1 formation in Weizhou 6-8 oilfield mainly comes from two meandering rivers in the NNE direction. The newly discovered north-south meandering river channel is in the deepest part of the riverbed. The sandstone reservoir is enriched and located on T8l mudstone, shale and oil shale source rocks, and the top of the channel is covered by interbay mudstone, which can form an independent lithologic trap and may contain oil and gas to form oil and gas reservoirs, which is worthy of further exploration.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13

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