高孔隙性砂巖中變形帶類型、特征及成因機制
發(fā)布時間:2018-01-22 18:45
本文關鍵詞: 高孔隙性砂巖 變形帶 反向改造 低物性斷裂帶 出處:《中國礦業(yè)大學學報》2017年06期 論文類型:期刊論文
【摘要】:為了探索斷裂對高孔隙性儲層改造作用,在部分渤海灣盆地鉆井取芯資料及結合國內外相關研究的基礎上,對高孔隙砂巖變形機制、發(fā)育的亞地震構造及其特征進行了系統分析.認為高孔隙性砂巖變形有別于低-非孔隙性巖石,不是由破裂作用產生裂縫,而是由于顆粒流作用、碎裂作用和碎裂流作用形成與裂縫相對應的另一種類型亞地震構造,而巖石變形產生的亞地震構造對儲層具有反向改造作用.高孔隙性砂巖變形形成的亞地震構造為物性較母巖明顯降低的變形帶.研究結果表明:變形帶孔隙度比母巖低10%~25%,滲透率比母巖低1~7個數量級,變形帶包括解聚帶、碎裂帶、壓溶膠結碎裂帶和硅酸鹽帶4種類型,滲透率具有依次降低趨勢.高孔隙性儲層變形產生變形帶,因變形帶物性低,造成儲層物性整體變低,低-非孔隙性儲層變形產生裂縫,提高儲層物性.
[Abstract]:In order to explore the effect of fault on the reconstruction of high porosity reservoir, the deformation mechanism of high porosity sandstone is studied on the basis of coring data from drilling in part of Bohai Bay Basin and related research at home and abroad. The developed subseismic structures and their characteristics are systematically analyzed. It is considered that the deformation of high-porosity sandstone is different from that of low-porosity rocks, which is caused not by fracture but by particle flow. Another type of subseismic structure corresponding to the fracture is formed by fragmentation and cataclastic flow. The subseismic structure produced by rock deformation has reverse transformation to reservoir. The subseismic structure formed by deformation of high porosity sandstone is a deformed zone whose physical property is obviously lower than that of parent rock. The results show that:. The porosity of the deformation zone is 10% or 25% lower than that of the parent rock. The permeability is 1 ~ 7 orders of magnitude lower than that of the parent rock, and the deformation zone includes four types: depolymerization zone, fragmentation zone, pressure sol clastic zone and silicate zone. The deformation of high porosity reservoir leads to deformation zone, which results in low physical property of reservoir and fracture in low porosity reservoir, and improves reservoir physical property.
【作者單位】: 東北石油大學CNPC斷裂控藏研究室;黑龍江省科技創(chuàng)新"斷層變形封閉性及與流體運移"團隊;東北石油大學"非常規(guī)油氣成藏與開發(fā)"省部共建國家重點實驗室培育基地;東北石油大學地球科學學院;大慶油田有限責任公司勘探開發(fā)研究院;
【基金】:國家自然科學基金重點聯合基金項目(U1562214);國家自然科學基金項目(41572127) 國家科技重大專項(2016ZX05054009)
【分類號】:P588.212.3;P618.13
【正文快照】: 劉志達1,2,3,4,付曉飛1,2,3,4,孟令東1,2,3,4,杜慶龍5,孫永河1,2,3,4,王升1,2,3(1.東北石油大學CNPC斷裂控藏研究室,黑龍江大慶163318;2.黑龍江省科技創(chuàng)新“斷層變形、封閉性及與流體運移”團隊,黑龍江大慶163318;3.東北石油大學“非常規(guī)油氣成藏與開發(fā)”省部共建國家重點實驗
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