本文選題：洼59 + 重力泄水��； 參考：《東北石油大學(xué)》2015年碩士論文

【摘要】：洼59塊S3油層為一受構(gòu)造控制的厚層塊狀邊底水特-超深層超稠油油藏,該塊于1997年采用100m井距、正方形井網(wǎng)、蒸汽吞吐方式投入開發(fā)。截止2009年9月,該油藏已出現(xiàn)高采出程度、高吞吐輪次、低周期油汽比、油藏低壓舉升難度大等開發(fā)問題,轉(zhuǎn)換開發(fā)方式迫在眉睫。然而目前成熟的蒸汽驅(qū)、SAGD、熱水驅(qū)等稠油主體技術(shù)都不適合該塊開發(fā)。重力泄水輔助蒸汽驅(qū)是遼河油田的原創(chuàng)技術(shù),是一種深層超稠油油藏吞吐后提高采收率的新技術(shù)。根據(jù)油藏特點(diǎn)及開發(fā)現(xiàn)狀,對洼59重力泄水輔助蒸汽驅(qū)進(jìn)行了井網(wǎng)井距設(shè)計(jì)、注采參數(shù)優(yōu)化設(shè)計(jì)和轉(zhuǎn)驅(qū)時(shí)機(jī)研究,通過數(shù)值模擬技術(shù),明確了注入水平井、排液水平井和直井之間的相互距離,并結(jié)合油藏地質(zhì)開發(fā)特征,設(shè)計(jì)了注汽水平井與排液水平井正對;注汽水平井、排液水平井平面斜交,回型直井;注汽水平井、排液水平井平行錯(cuò)置等三種井網(wǎng)。根據(jù)洼59重力泄水輔助蒸汽驅(qū)油藏方案設(shè)計(jì)要求,開展了該油藏注汽工藝研究、舉升工藝研究、監(jiān)測工藝研究與配套工藝研究。通過汽水分離器、高效隔熱管柱、環(huán)空注氮隔熱、雙管注汽、多點(diǎn)注汽的優(yōu)化配合解決了洼59重力泄水輔助蒸汽驅(qū)注汽井筒熱損失大、高干度注汽難,水平段均勻動(dòng)用困難等難點(diǎn);優(yōu)選了洼59重力泄水輔助蒸汽驅(qū)的舉升方式,解決了油藏埋藏較深、大排量高溫排液舉升較困難等難點(diǎn),保證了水平生產(chǎn)井有效泄水,為蒸汽腔的擴(kuò)展降低了壓力,提供了空間。洼59于2009年10月開始進(jìn)行重力泄水輔助蒸汽驅(qū)試驗(yàn),截止2013年12月,洼59塊已實(shí)施重力泄水輔助蒸汽驅(qū)井組8個(gè),實(shí)施效果顯著,井組產(chǎn)量持續(xù)上升,日產(chǎn)油由初期的30t/d上升目前的204t/d,瞬時(shí)油汽比達(dá)到0.23,累積油汽比0.16,階段增產(chǎn)原油18.27萬噸,增油效果明顯,有效緩解了洼59產(chǎn)量遞減形勢,大幅度提高了油藏采收率。
[Abstract]:The S3 oil reservoir of block WA 59 is a thick layer block, bottom water, ultra-deep super heavy oil reservoir controlled by structure. In 1997, the block adopted 100m well spacing, square well pattern and steam huff and puff mode to be put into development. As of September 2009, the reservoir has appeared the development problems such as high production degree, high times of huff and puff, low period oil / steam ratio, high difficulty of raising low pressure, and so on, so it is urgent to change the development mode. However, the main technologies of steam flooding and hot water flooding are not suitable for the development of this block. Gravity drainage assisted steam flooding is an original technology in Liaohe Oilfield and a new technology for enhancing recovery after huff and puff in deep and super heavy oil reservoirs. According to the reservoir characteristics and present development situation, well spacing design, injection-production parameter optimization design and timing study are carried out for WA59 gravity drain assisted steam drive. Through numerical simulation technology, the injection horizontal well is determined. The distance between the horizontal well and the horizontal well, and combining with the geological development characteristics of the reservoir, the authors have designed the horizontal well for steam injection and the horizontal well for the discharge of liquid; the horizontal well for steam injection, the horizontal well for the drainage, the horizontal well for the return type; the horizontal well for the injection of steam and water, the horizontal well for the horizontal well, the horizontal well for the horizontal well, There are three kinds of well pattern, such as parallel misplacement of horizontal well. According to the design requirements of WA59 gravity drainage auxiliary steam drive reservoir, the steam injection technology, lifting technology, monitoring technology and supporting technology of the reservoir are studied. Through the optimization of steam separator, high-efficiency heat insulation pipe string, nitrogen injection and insulation in annulus, double pipe steam injection and multi-point steam injection, the heat loss of steam injection wellbore and the difficulty of steam injection with high dryness are solved in the steam injection wellbore of the auxiliary steam drive with gravity discharge of water by WA59. The difficulty of even producing horizontal section is difficult, the lifting mode of Wax59 gravity drainage auxiliary steam drive is selected, the difficulty of deep reservoir burial and high temperature liquid lifting with large displacement is solved, and the effective drainage of horizontal production well is ensured. It reduces the pressure and provides space for the expansion of the steam chamber. In October 2009, WA59 began to carry out gravity drainage auxiliary steam drive test. As of December 2013, Wak59 block has implemented 8 gravity drain auxiliary steam drive wells, with remarkable effect and continuous increase of well group output. The daily oil production increased from the initial 30t/d to 204t / d, the instantaneous oil-steam ratio reached 0.23, the cumulative oil-steam ratio reached 0.16, and the oil production increased by 182700 tons at the stage. The effect of increasing oil production was obvious, which effectively alleviated the declining situation of the production of WA59 and greatly improved the oil recovery.
【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】：2015
【分類號】：TE345

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 張鷹;蒸汽驅(qū)過程中油藏壓力的控制[J];特種油氣藏;2001年04期

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本文編號：2091020