【摘要】：為了解決三角洲平原亞相儲(chǔ)層砂體分布復(fù)雜和靜態(tài)連通性評(píng)價(jià)難的問(wèn)題,以松遼盆地肇州油田扶余油層為例,綜合利用巖心、測(cè)井等資料,采用沉積成因類(lèi)比和概率模型的方法,系統(tǒng)的研究了三角洲平原亞相環(huán)境下的儲(chǔ)層連通概率,提出砂體幾何學(xué)特征、井網(wǎng)密度、物源方向和地層砂地比是影響儲(chǔ)層靜態(tài)連通性定量評(píng)價(jià)的主控因素.研究結(jié)果表明:儲(chǔ)層連通概率與砂體寬厚比和地層砂地比呈正相關(guān),與井距和物源方向偏角的正弦值呈反相關(guān);三角洲平原亞相主要由單期分流河道、復(fù)合分流河道和決口扇3種微相組成,其中單期分流河道寬厚比15~30,復(fù)合分流河道寬厚比45~60,決口扇寬厚比和長(zhǎng)寬比分別約120和75;當(dāng)前220m井距條件下,單期分流河道為主的FⅠ4小層砂體連通概率為25%,復(fù)合分流河道為主的FⅠ7小層砂體連通概率為55%;單期分流河道、復(fù)合分流河道和決口扇砂地比‘瀑布區(qū)’范圍分別為25%~35%,20%~30%,15%~20%.應(yīng)用上述方法對(duì)評(píng)價(jià)區(qū)進(jìn)行鉆井驗(yàn)證,砂體符合率達(dá)87.5%以上.
[Abstract]:In order to solve the problems of complex sand body distribution and difficult static connectivity evaluation in delta plain subfacies reservoir, taking Fuyu reservoir of Zhaozhou Oilfield in Songliao Basin as an example, the core and logging data are comprehensively used. By means of sedimentary genetic analogy and probability model, the reservoir connectivity probability in delta plain subfacies environment is systematically studied, and the geometric characteristics of sand body and well pattern density are presented. The direction of material source and the ratio of formation sand to soil are the main factors influencing the quantitative evaluation of reservoir static connectivity. The results show that the probability of reservoir connectivity is positively correlated with the ratio of width to thickness of sand body and the ratio of sand to ground, and is inversely correlated with the sinusoidal value of well spacing and the deviation angle of source direction, and the subfacies of delta plain are mainly separated by single-stage distributary channel. The composite distributary channel and crevasse fan are composed of three kinds of microfacies, in which the ratio of width to thickness is 1530, the ratio of width to thickness is 4560, the ratio of width to thickness and the ratio of length to width are about 120 and 75, respectively. The connectivity probability of F 鈪，

本文編號(hào)：2286052