本文選題：沉積相 + 儲(chǔ)層特征��； 參考：《西北大學(xué)》2015年碩士論文

【摘要】：鄂爾多斯盆地富縣探區(qū)黃家?guī)X——水磨溝長(zhǎng)8油層組在2009年取得突破,并圈定了含油面積,表明本區(qū)長(zhǎng)8段良好的勘探前景,但限于本區(qū)勘探程度相對(duì)較低、分析測(cè)試資料等短缺,油藏特征等研究程度較低,制約了該區(qū)的油氣勘探工作。本文在前人研究的基礎(chǔ)上,在現(xiàn)代油氣地質(zhì)理論為指導(dǎo)下,通過(guò)地表地層露頭剖面與地下巖心巖屑及測(cè)井資料相結(jié)合,區(qū)域資料與單井資料相結(jié)合,充分各類利用分析測(cè)試資料,從影響儲(chǔ)層形成的區(qū)域背景、沉積體系、巖石成分、微觀孔隙結(jié)構(gòu)等方面,對(duì)黃家?guī)X——水磨溝長(zhǎng)8儲(chǔ)層特征進(jìn)行了深入研究,取得的主要認(rèn)識(shí)：根據(jù)測(cè)井、巖性資料及分層標(biāo)志將黃家?guī)X—水磨溝延長(zhǎng)組長(zhǎng)8段進(jìn)一步劃分為長(zhǎng)81、長(zhǎng)82兩個(gè)小層。長(zhǎng)8段為三角洲前緣亞相沉積,并進(jìn)一步劃分為水下分流河道和分流間灣微相,平面上長(zhǎng)82期發(fā)育有4條水下分流河道,長(zhǎng)81期發(fā)育有3條水下分流河道。長(zhǎng)8儲(chǔ)層巖石主要為長(zhǎng)石砂巖,碎屑成分以長(zhǎng)石為主,平均為49.2%,其次為石英平均為29.4%,巖屑平均為15.8%；砂巖碎屑顆粒分選較好,磨圓度以次棱次圓為主,次棱、次圓次之；以點(diǎn)-線式接觸為主,其次為線接觸和凹凸接觸；以孔隙型膠結(jié)為主,薄膜-孔隙型膠結(jié)次之。長(zhǎng)8儲(chǔ)層孔隙度大多介于6%-13%,平均為8.0%；滲透率大多介于0.15-0.45×10-3um2,平均為0.28×10-3um2,為特低孔、超低滲儲(chǔ)層,具有較強(qiáng)非均質(zhì)性；根據(jù)試油孔段層位出油情況以及聲波時(shí)差—電阻率關(guān)系,研究區(qū)延長(zhǎng)組長(zhǎng)8’油層亞組有效油層電性下限標(biāo)準(zhǔn)為：電阻率≥23Ωm；聲波時(shí)差229gs/m,長(zhǎng)8-有效油層亞組電性下限標(biāo)準(zhǔn)為：電阻率≥19Ωm；聲波時(shí)差≥228μs/m。對(duì)黃家?guī)X—水磨溝長(zhǎng)8儲(chǔ)層進(jìn)行綜合分類評(píng)價(jià),總的分為4類,其中長(zhǎng)81、長(zhǎng)82小層中Ⅲ類儲(chǔ)層分別占53.4%、65.5%。沉積作用和儲(chǔ)層物性是本區(qū)長(zhǎng)8油藏分布的主控因素。
[Abstract]:The breakthrough of Huangjialing-Shuimogou Chang 8 reservoir formation in Fuxian exploration area of Ordos Basin in 2009 and the delineation of oil-bearing area indicate that the exploration prospect of Chang 8 in this area is good, but the exploration degree is relatively low in this area. The shortage of analysis and test data and the low research degree of reservoir characteristics restrict the oil and gas exploration in this area. Based on the previous studies and guided by the modern oil and gas geology theory, this paper combines the outcrop profile of the surface formation with the underground core cuttings and logging data, the regional data and the single well data. The characteristics of Huangjialing-Shuimaogou Chang 8 reservoir are studied in terms of the regional background, sedimentary system, rock composition, micro pore structure and so on. According to logging, lithologic data and stratification marks, the 8th member of Huangjialing and Shuimogou Yanchang formation is further divided into two sub-layers: Chang 81 and Chang 82. Chang 8 is a delta front subfacies deposit and further divided into underwater distributary channel and interdistributary bay microfacies. There are 4 underwater distributary channels in Chang82 stage and 3 underwater distributary channels in Chang81 period. The main rock of Chang 8 reservoir is feldspathic sandstone, the main clastic composition is feldspar, the average is 49.2, the second is quartz, and the average is 15.8. Point-line contact is the main contact followed by linear contact and concave and convex contact and pore cementation followed by thin-film pore cementation. The porosity of Chang 8 reservoir is mostly between 6 ~ 13, with an average of 8.0. The permeability of Chang8 reservoir is between 0.15-0.45 脳 10 ~ (-3) um2, with an average of 0.28 脳 10 ~ (-3) um2.It is an ultra-low porosity and super-low permeability reservoir with strong heterogeneity. The lower limit of electrical properties of the Yanchang 8'formation is as follows: resistivity 鈮，

本文編號(hào)：2028733