本文關(guān)鍵詞： 低滲透油藏 儲(chǔ)層特征 注水開(kāi)發(fā) 油藏工程 開(kāi)發(fā)方案　出處：《西安石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：根據(jù)對(duì)吳起油田曾岔地區(qū)長(zhǎng)61油藏沉積、構(gòu)造、儲(chǔ)層、及油層分布等特征的綜合分析,本區(qū)長(zhǎng)61油藏油氣分布主要受儲(chǔ)層沉積特征、巖性及物性等因素控制,屬于巖性油藏或巖性-構(gòu)造復(fù)合油氣藏。由于研究區(qū)儲(chǔ)層物性條件較差,構(gòu)造不發(fā)育,長(zhǎng)61油藏油水分異不太明顯,油水混儲(chǔ),無(wú)明顯的油水界面,缺乏邊、底水。曾岔油田長(zhǎng)91亦屬于巖性油藏或巖性-構(gòu)造復(fù)合油氣藏。從每個(gè)層位的生產(chǎn)井產(chǎn)能級(jí)別分類可以看出,主要生產(chǎn)層位是長(zhǎng)6層。41-248井區(qū)長(zhǎng)6層的產(chǎn)能比28-46井區(qū)長(zhǎng)6層的產(chǎn)能高,長(zhǎng)9層的產(chǎn)能又較長(zhǎng)6層的要高一些。長(zhǎng)6采區(qū)屬于低孔特低滲透油藏,油藏儲(chǔ)層巖性致密,孔喉半徑小,滲流阻力大,導(dǎo)致油井幾乎無(wú)自然產(chǎn)能。大多數(shù)油井為壓裂投產(chǎn)。曾岔油區(qū)適合注水開(kāi)發(fā)。結(jié)合曾岔油區(qū)的油藏地質(zhì)特征,認(rèn)為本區(qū)應(yīng)采用注水方式保持地層壓力,以期最大限度地提高油田采收率,獲取最佳經(jīng)濟(jì)效益。通過(guò)油藏工程分析,對(duì)現(xiàn)有井網(wǎng)進(jìn)行優(yōu)化研究,建議注采井網(wǎng)采用450-150m的不規(guī)則菱形反九點(diǎn),局部不好調(diào)整為反九點(diǎn)的井組,采用五點(diǎn)法井網(wǎng)進(jìn)行調(diào)整。
[Abstract]:According to the comprehensive analysis of the sedimentary, structural, reservoir and reservoir distribution characteristics of Chang61 reservoir in Zengcha area, Wuqi Oilfield, the oil and gas distribution of Chang61 reservoir in this area is mainly attributed to the sedimentary characteristics of the reservoir. The lithology and physical properties are controlled by lithologic reservoir or lithology-structure compound reservoir. Because of the poor physical condition of reservoir in the study area, the structure is not developed, the oil-water differentiation of Chang 61 reservoir is not obvious, and the oil-water mixed reservoir is not obvious. There is no obvious oil-water interface, lack of edge and bottom water. Chang91 of Zengcha Oilfield also belongs to lithologic reservoir or lithology-structure composite reservoir. The productivity of the main production horizon is 6 layers. 41-248 well area is higher than that of 28-46 well area. The productivity of Chang 9 layer is higher than that of long 6 layer. Chang6 production area belongs to low porosity and low permeability reservoir with tight lithology, small pore throat radius and large percolation resistance. As a result, the oil wells have almost no natural productivity. Most of the wells are produced by fracturing. Zengcha oil area is suitable for water injection development. Combined with the reservoir geological characteristics of Zengcha oil area, it is considered that water injection should be used to maintain formation pressure in this area. In order to maximize oil recovery, obtain the best economic benefits. Through reservoir engineering analysis, the existing well pattern optimization research. It is suggested that the injection and production well pattern should be adjusted with the irregular rhombic inverse nine points of 450-150 m and the well group which is not easy to adjust to the inverse nine points in the local area and the five-point well pattern should be used to adjust the well pattern.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE357.6

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