【摘要】：隨著油田開發(fā)時間的推移,井下地層開始虧空,壓力逐漸降低,要保證油井的持續(xù)穩(wěn)產(chǎn),就一定要增加地層壓力來保證油井的正常生產(chǎn)。二次采油是油田開發(fā)的必經(jīng)之路,是保持油田高產(chǎn)穩(wěn)產(chǎn)、提高采收率的途徑之一。特別是進(jìn)入開發(fā)中后期的老油田,常規(guī)區(qū)塊挖潛能力有限,油田注水開發(fā)是技術(shù)密集型系統(tǒng)工程,注水開發(fā)方案是油田開發(fā)的綱領(lǐng)性文件,與油田開發(fā)的經(jīng)濟技術(shù)效果有必然聯(lián)系,特別是對一些難動用區(qū)塊進(jìn)行開發(fā),需要通過注水、注氣等一系列工藝技術(shù),將難動用區(qū)塊的油氣開采出來,從而提高油田產(chǎn)量。針對遼河油田歡103區(qū)塊的地質(zhì)情況,目前主要通過給地層注水等方式進(jìn)行開采。歡103區(qū)塊位于歡喜嶺下臺階,區(qū)塊斷層比較發(fā)育,在北東向的歡4—齊133主干斷層及近東西向斷層作用下,形成了一系列的斷塊。目前該區(qū)塊共有油井16口,其中有15口油井位于杜家臺油層。截止2012年12月,歡103塊杜家臺油層共有油井10口,正常開井1口,撈油2口,平均每天原油產(chǎn)量為0.7t,不含水,累積產(chǎn)油6.07×104t,累積產(chǎn)水1.51×104m~3,累產(chǎn)氣4164.0×104m~3。歡103塊平均單井初期日產(chǎn)油11.5t,歡103井日產(chǎn)能力最高,為51.9t。統(tǒng)計區(qū)塊12口壓裂投產(chǎn)井初期日產(chǎn)、采油強度及階段產(chǎn)油量可以看出,多數(shù)油井在投產(chǎn)初期有一定的產(chǎn)能。其中初期日產(chǎn)油超過20t的油井1口,超過10t的油井4口。但采油強度較低,超過1 t/(d·m)的油井只有2口,說明油井的供液能力不足。另外,該區(qū)塊邊底水能量較弱,且無注水井為地層補充能量,因此油井產(chǎn)量遞減較快。因此依據(jù)油藏特點,轉(zhuǎn)變開發(fā)方式,通過開展注水,從而提高儲層動用程度,改善開發(fā)效果。
[Abstract]:With the development time of oil field, the downhole formation begins to deficit and the pressure decreases gradually. In order to ensure the sustained and stable production of oil wells, the formation pressure must be increased to ensure the normal production of the wells. Secondary oil recovery is the only way to develop oil field. It is one of the ways to maintain high and stable oil production and improve oil recovery. Especially for the old oil fields in the middle and late stages of development, the ability of tapping potential in conventional blocks is limited, the oilfield water injection development is a technology-intensive system engineering, and the water injection development scheme is a programmatic document for oil field development. It is necessary to develop some hard-to-produce blocks by a series of technology, such as water injection and gas injection, in order to improve the oil and gas production. According to the geological condition of Huan103 block in Liaohe Oilfield, the main way of exploitation is to inject water into the formation. Block Huan103 is located on the lower steps of Huanxiling and the block faults are relatively developed. A series of fault blocks have been formed under the action of the main fault of Huan4Qi 133 in the NE direction and the near east-west fault. Currently, there are 16 oil wells in the block, 15 of which are located in Dujiatai reservoir. As of December 2012, there were 10 oil wells in Huan103 Dujiatai reservoir, 1 well opened normally and 2 wells were fished. The average daily crude oil production was 0.7 t, with no water content, cumulative oil production 6.07 脳 10 4 t, cumulative water production 1.51 脳 10 4 m ~ (3) and cumulative gas production 4164.0 脳 10 4 m ~ (3). The average daily oil production of Huan103 block is 11.5t at the initial stage of single well, and the daily production capacity of Huan103 well is the highest (51.9 t). The daily production of 12 fracturing wells in the statistical block, the oil recovery intensity and the oil production at the stage can be seen that most wells have certain productivity at the early stage of production. Among them, one oil well with daily production of more than 20 tons at the initial stage and four wells with more than 10 tons of oil production. But the oil recovery intensity is low, there are only 2 wells with more than 1 t / (d m), which indicates that the oil well has insufficient fluid supply capacity. In addition, the energy of the edge and bottom water in this block is weak, and no injection well is used to replenish the formation energy, so the oil well production decreases rapidly. Therefore, according to the reservoir characteristics, change the development mode, through the development of water injection, so as to improve the reservoir production degree and improve the development effect.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE357

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