蘇53區(qū)塊南水平井開發(fā)井網(wǎng)優(yōu)化研究
發(fā)布時(shí)間：2018-10-23 18:25
【摘要】：蘇53區(qū)塊南部構(gòu)造位于鄂爾多斯盆地伊陜斜坡北部中帶,主體構(gòu)造為西北傾的單斜構(gòu)造,目的層盒8段及山1段分別為辮狀河沉積和曲流河沉積,儲(chǔ)集體為心灘、邊灘和河道砂,是控制蘇53區(qū)塊南部地區(qū)有利區(qū)的主要微相。平面上砂體成北西-南東條帶狀分布,局部連片;垂向上有效砂體疊瓦狀分布,側(cè)向連續(xù)性差,造成氣藏分布的復(fù)雜性及儲(chǔ)層非均質(zhì)性強(qiáng)。通過儲(chǔ)層建模相關(guān)認(rèn)識(shí),結(jié)合地應(yīng)力和天然微裂縫發(fā)育情況預(yù)測(cè)了有效儲(chǔ)集砂體分布規(guī)律,在此基礎(chǔ)上利用地震屬性預(yù)測(cè)有利含氣區(qū)。研究區(qū)砂體總體呈現(xiàn)連片分布,其中,中、西部(蘇53-3、蘇53-4)地區(qū)砂體累積厚度較大,最大超過30米,東部(蘇53-8)地區(qū)累積厚度不足3米,含氣有利區(qū)和砂體厚度分布有較好的一致性。根據(jù)蘇里格地區(qū)“一點(diǎn)法”產(chǎn)能經(jīng)驗(yàn)公式,計(jì)算得出38口水平井平均產(chǎn)能44×104m3/d;利用物質(zhì)平衡法、生產(chǎn)動(dòng)態(tài)分析法、雙對(duì)數(shù)擬合法等9種方法對(duì)水平井進(jìn)行了試采動(dòng)態(tài)特征分析,預(yù)測(cè)了目前38口水平井平均單井井控動(dòng)態(tài)儲(chǔ)量7039×104m3,通過建立各井井控動(dòng)態(tài)儲(chǔ)量的預(yù)測(cè)圖版,得出研究區(qū)平均單井最終井控動(dòng)態(tài)儲(chǔ)量12391×104m3。蘇53區(qū)塊南部地區(qū)通過數(shù)值模擬,認(rèn)為合理水平段長度應(yīng)控制在800~1000m之間,水平井的方位與地層主應(yīng)力垂直,即為350°左右,通過壓恢試井解釋、經(jīng)濟(jì)極限井網(wǎng)密度、合理采氣速度、儲(chǔ)量豐度、等效滲流計(jì)算及數(shù)值模擬結(jié)果,綜合認(rèn)為合理井距為600~800m。根據(jù)儲(chǔ)層砂體分布特點(diǎn)采用近似菱形的不規(guī)則井網(wǎng),井排間井點(diǎn)交叉分布。通過對(duì)井網(wǎng)方式、井網(wǎng)與地應(yīng)力的關(guān)系、井距、水平井設(shè)計(jì)參數(shù)、產(chǎn)能、井控動(dòng)態(tài)儲(chǔ)量這幾方面全面的綜合分析,認(rèn)為目前水平井井網(wǎng)與氣藏地質(zhì)具有較好的適應(yīng)性,達(dá)到了水平井開發(fā)的技術(shù)經(jīng)濟(jì)要求。
[Abstract]:The southern part of Su53 block is located in the northern middle belt of the Yishan slope in Ordos Basin. The main structure is a northwestern monoclinic structure, the target layer 8 member and the Shan 1 member are braided river deposits and meandering river deposits respectively, and the reservoir body is the core beach. The beach and channel sand are the main microfacies controlling the favorable area in the southern part of Su53 block. The sand bodies on the plane are distributed in the north west south east strip and the vertical effective sand bodies are imbricate distribution with poor lateral continuity which leads to the complexity of the gas reservoir distribution and the strong heterogeneity of the reservoir. Based on the understanding of reservoir modeling and combining with the development of in-situ stress and natural micro-fractures, the distribution law of effective reservoir sand bodies is predicted. On this basis, favorable gas-bearing areas are predicted by seismic attributes. The sand bodies in the study area generally show a continuous distribution. In the west (Su 53-3, Su 53-4), the accumulated thickness of the sand body is larger, the maximum is more than 30 meters, and the accumulated thickness in the east (Su 53-8) is less than 3 meters. There is good consistency between the thickness distribution of gas bearing favorable zone and sand body. According to the empirical formula of "one point method" productivity in Sulige area, the average productivity of 38 horizontal wells was calculated and obtained, and 9 methods, such as material balance method, production dynamic analysis method and double logarithm fitting method, were used to analyze the performance characteristics of horizontal wells. The average single well controlled reserves of 38 horizontal wells at present are predicted at 7039 脳 10 ~ 4m ~ (3). By establishing the prediction chart of each well's control performance reserves, it is obtained that the average final well control performance reserves in the study area are 12391 脳 10 ~ (4) m ~ (3). Through numerical simulation in the southern area of Su53 block, it is considered that the reasonable horizontal section length should be controlled between 800m and 1000m, and the orientation of horizontal well should be vertical to the main stress of formation, that is, 350 擄. The economic limit well pattern density can be explained by pressure recovery well test. The reasonable gas production rate, reserve abundance, equivalent seepage calculation and numerical simulation results show that the reasonable well spacing is 600 ~ 800m. According to the distribution characteristics of reservoir sand body, the irregular well pattern is approximately rhombic, and the cross distribution of well points between rows is adopted. Through comprehensive analysis of well pattern mode, the relationship between well pattern and ground stress, well spacing, horizontal well design parameters, productivity, well control dynamic reserves, it is concluded that the horizontal well pattern has good adaptability to gas reservoir geology. Meet the technical and economic requirements of horizontal well development.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE243
，
本文編號(hào)：2290099
[Abstract]:The southern part of Su53 block is located in the northern middle belt of the Yishan slope in Ordos Basin. The main structure is a northwestern monoclinic structure, the target layer 8 member and the Shan 1 member are braided river deposits and meandering river deposits respectively, and the reservoir body is the core beach. The beach and channel sand are the main microfacies controlling the favorable area in the southern part of Su53 block. The sand bodies on the plane are distributed in the north west south east strip and the vertical effective sand bodies are imbricate distribution with poor lateral continuity which leads to the complexity of the gas reservoir distribution and the strong heterogeneity of the reservoir. Based on the understanding of reservoir modeling and combining with the development of in-situ stress and natural micro-fractures, the distribution law of effective reservoir sand bodies is predicted. On this basis, favorable gas-bearing areas are predicted by seismic attributes. The sand bodies in the study area generally show a continuous distribution. In the west (Su 53-3, Su 53-4), the accumulated thickness of the sand body is larger, the maximum is more than 30 meters, and the accumulated thickness in the east (Su 53-8) is less than 3 meters. There is good consistency between the thickness distribution of gas bearing favorable zone and sand body. According to the empirical formula of "one point method" productivity in Sulige area, the average productivity of 38 horizontal wells was calculated and obtained, and 9 methods, such as material balance method, production dynamic analysis method and double logarithm fitting method, were used to analyze the performance characteristics of horizontal wells. The average single well controlled reserves of 38 horizontal wells at present are predicted at 7039 脳 10 ~ 4m ~ (3). By establishing the prediction chart of each well's control performance reserves, it is obtained that the average final well control performance reserves in the study area are 12391 脳 10 ~ (4) m ~ (3). Through numerical simulation in the southern area of Su53 block, it is considered that the reasonable horizontal section length should be controlled between 800m and 1000m, and the orientation of horizontal well should be vertical to the main stress of formation, that is, 350 擄. The economic limit well pattern density can be explained by pressure recovery well test. The reasonable gas production rate, reserve abundance, equivalent seepage calculation and numerical simulation results show that the reasonable well spacing is 600 ~ 800m. According to the distribution characteristics of reservoir sand body, the irregular well pattern is approximately rhombic, and the cross distribution of well points between rows is adopted. Through comprehensive analysis of well pattern mode, the relationship between well pattern and ground stress, well spacing, horizontal well design parameters, productivity, well control dynamic reserves, it is concluded that the horizontal well pattern has good adaptability to gas reservoir geology. Meet the technical and economic requirements of horizontal well development.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE243
，
本文編號(hào)：2290099
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