西北大学学报(自然科学版)
西北大學學報(自然科學版)
서북대학학보(자연과학판)
JOURNAL OF NORTHWEST UNIVERSITY(NATURAL SCIENCE EDITION)
2010年
2期
293-298
,共6页
杨县超%屈红军%崔智林%范玉海%马强%雷露
楊縣超%屈紅軍%崔智林%範玉海%馬彊%雷露
양현초%굴홍군%최지림%범옥해%마강%뢰로
长8油层组%吴起-定边地区%浅水台地型三角洲%水下分流河道
長8油層組%吳起-定邊地區%淺水檯地型三角洲%水下分流河道
장8유층조%오기-정변지구%천수태지형삼각주%수하분류하도
Chang 8 oil-bearing formation%Wuqi-Dingbian area%shallow water terrace type delta%subaqueous distributary channel
目的 探究鄂尔多斯盆地吴起-定边地区长8油层组沉积相类型及发育规律.方法 以岩心观察的岩石相标志及测井相分析为基础,通过井剖面的相序分析、联井沉积相对比剖面及砂地比值分布规律进行综合研究.结果 确定了吴起-定边地区长8油层组的沉积相类型、发育特征及沉积相展布规律.结论 吴起-定边地区长8油层组发育西北、东北及西南3个方向的浅水台地型三角洲前缘沉积,其中西北和东北两个方向的三角洲前缘沉积占主导地位,不同方向三角洲前缘水下分流河道的分布具"沿河口带变宽并叠置连片"的规律.
目的 探究鄂爾多斯盆地吳起-定邊地區長8油層組沉積相類型及髮育規律.方法 以巖心觀察的巖石相標誌及測井相分析為基礎,通過井剖麵的相序分析、聯井沉積相對比剖麵及砂地比值分佈規律進行綜閤研究.結果 確定瞭吳起-定邊地區長8油層組的沉積相類型、髮育特徵及沉積相展佈規律.結論 吳起-定邊地區長8油層組髮育西北、東北及西南3箇方嚮的淺水檯地型三角洲前緣沉積,其中西北和東北兩箇方嚮的三角洲前緣沉積佔主導地位,不同方嚮三角洲前緣水下分流河道的分佈具"沿河口帶變寬併疊置連片"的規律.
목적 탐구악이다사분지오기-정변지구장8유층조침적상류형급발육규률.방법 이암심관찰적암석상표지급측정상분석위기출,통과정부면적상서분석、련정침적상대비부면급사지비치분포규률진행종합연구.결과 학정료오기-정변지구장8유층조적침적상류형、발육특정급침적상전포규률.결론 오기-정변지구장8유층조발육서북、동북급서남3개방향적천수태지형삼각주전연침적,기중서북화동북량개방향적삼각주전연침적점주도지위,불동방향삼각주전연수하분류하도적분포구"연하구대변관병첩치련편"적규률.
Aim To establish sedimentary facies types and development regulations of Chang 8 oil-bearing formation in Wuqi-Dingbian area,Ordos Basin.Methods On basis of petrofacies characteristics of drill cores and analysis of well logging electrofacies,it is studied by means of synthesized analysis of facies sequence of well profiles,comparison profile of joint well sedimentary facies and distribution regulations of sandy land ratio.Results Sedimentary facies types,characteristics and distributary regulations of sedimentary facies are confirmed.Conclusion Chang 8 oil-bearing formation in Wuqi-Dingbian area develops frontal deposition of shallow water terrace type deltas,which were sourced from northwest,northeast and southwest,of which deltas frontal depositions of northwest and northeast sources are dominated.Distributions of subaqueous distributary channels of deltas front in different directions have the characteristics of becoming width and sheet like overiding along river mouth.