發(fā)布時(shí)間：2018-07-01 16:01

  本文選題：白云凹陷 + 合成地震記錄　； 參考：《成都理工大學(xué)》2016年碩士論文

【摘要】：白云凹陷位于南海北部陸坡深水區(qū),屬于珠江口盆地珠二坳陷。本文研究區(qū)位于白云凹陷南部,面積約為4000km2,研究目的層ZHSB6層序位于珠海組地層的上部。在ZHSB6、ZHSB5層序界面解釋的基礎(chǔ)上,加密到1×1網(wǎng)格并反復(fù)修善解釋界面,并提取SQ6內(nèi)部均方根振幅屬性。通過工區(qū)內(nèi)5口井的數(shù)據(jù)結(jié)合波形分析,工區(qū)內(nèi)砂體主要分為三類:Ⅰ類砂巖(砂巖速度小于泥巖速度),Ⅰ類砂巖為分選和磨圓非常好、不含雜基等孔隙充填物的干凈砂巖,如河道、河口壩、席狀砂、水道砂等,是深水油氣勘探中良好的油氣儲集體,是本次論文研究的重點(diǎn)砂體;Ⅱ類砂巖(砂巖速度與泥巖速度基本相同);Ⅲ類砂巖(砂巖速度大于泥巖速度)。對工區(qū)內(nèi)五口井進(jìn)行人工合成記錄的制作,并通過波形分析、速度分析進(jìn)行調(diào)整,使人工合成地震記錄與井旁地震記錄道德振幅與波形相匹配,制作巖性柱狀圖。結(jié)合測井?dāng)?shù)據(jù),GR曲線制作沉積相綜合柱狀圖,使巖性、物性可以明顯的顯示。單井沉積相分析結(jié)果為:W18井在SB21界面之上時(shí),巖性主要為混積陸棚亞相泥質(zhì)灰?guī)r、泥巖,地震剖面上表現(xiàn)為低頻寬緩的弱振幅。SB23.8界面與ZHSB6界面之間的井段,巖性主要為泥巖、粗砂巖、細(xì)砂巖和泥質(zhì)粉砂巖,砂巖砂質(zhì)較為純凈,向下泥質(zhì)含量減少。W13-2井巖性以泥巖為主,夾有少量泥質(zhì)粉砂巖、粉砂質(zhì)泥巖薄層。主要沉積環(huán)境為外陸棚亞相、水動(dòng)力條件穩(wěn)定、沉積物質(zhì)供應(yīng)匱乏環(huán)境沉積,在地震剖面上表現(xiàn)為低頻寬緩弱振幅的特征。結(jié)合地震線描、波形分析和單井沉積相分析成果有效的將地震相轉(zhuǎn)化為沉積相,分析古水流方向。ZHSB6層序內(nèi)部發(fā)育2支主水流體系,物源方向?yàn)楸蔽?南東向。W35井巖性主要為泥巖并夾有薄層粉砂質(zhì)泥巖,泥巖整體較純凈,在MFS18.5界面附近砂質(zhì)增加。GR值較高,為三角洲前緣亞相環(huán)境沉積。在地震剖面上顯示為低頻弱振幅特征。W16位于研究區(qū)域中部。SB21界面與SB23.8界面之間,巖性主要為泥巖。GR曲線為指形,為水動(dòng)力條件穩(wěn)定、沉積物質(zhì)供應(yīng)匱乏的外陸棚亞相環(huán)境沉積。在地震剖面上呈現(xiàn)為低頻寬緩弱振幅特征。對ZHSB6層序進(jìn)行均方根振幅屬性提取,結(jié)合波形分析,對均方根屬性上不同顏色進(jìn)行分析,對砂體進(jìn)行圈定,通過砂體擴(kuò)邊解釋,分析沉積體系,較好地展示沉積體內(nèi)骨架地層分布及其平面分布形態(tài)。層序內(nèi)部形成了的三角洲平原-三角洲前緣海陸交互相-斜坡扇的沉積環(huán)境。
[Abstract]:Baiyun Sag is located in the deep water area on the northern slope of the South China Sea and belongs to the Pearl River mouth Basin. The study area of this paper is located in the south of Baiyun Sag with an area of about 4000km2. The ZHSB6 sequence of the target layer is located in the upper part of the Zhuhai formation. Based on the interpretation of ZHSB6 / ZHSB5 sequence interface, 1 脳 1 mesh is encrypted and the interpretation interface is modified repeatedly, and the amplitude attribute of root mean square inside SQ6 is extracted. Based on the data of 5 wells in the working area and waveform analysis, the sand bodies in the working area are mainly divided into three types: type I sandstone (sandstone velocity is less than mudstone velocity), type I sandstone is clean sandstone with very good sorting and grinding circle, and no pore filling such as complex base. Such as river channel, estuarine dam, sheet sand, channel sand and so on, are good oil and gas reservoirs in deepwater oil and gas exploration, and are the key sand bodies in this paper. Type 鈪，

本文編號：2088304