【摘要】：七里村油田長(zhǎng)_6 油藏為淺層超低滲透油藏,壓裂后人工裂縫為水平縫,直井開(kāi)采效果不理想。為改善開(kāi)發(fā)效果,水平井的水平段設(shè)計(jì)為縱向穿越不同的流動(dòng)單元,壓裂后形成多條水平裂縫�；诖怂悸�,設(shè)計(jì)了"一"字型、大斜度型和"弓"型3種形狀的井眼軌跡。數(shù)值模擬計(jì)算了3種井眼軌跡的開(kāi)發(fā)指標(biāo),"弓"型井眼軌跡生產(chǎn)效果最佳。在七平1井上開(kāi)展現(xiàn)場(chǎng)試驗(yàn),長(zhǎng)_(6_(2~2))油層實(shí)施6段壓裂,分別在3個(gè)流動(dòng)單元各造2組水平裂縫,水平井投產(chǎn)后開(kāi)發(fā)效果明顯改善,初期日產(chǎn)油、累計(jì)產(chǎn)油均達(dá)到同區(qū)直井的13.0倍以上。試驗(yàn)表明,采用"弓"型井眼軌跡可有效提高水平裂縫油藏儲(chǔ)量動(dòng)用程度,對(duì)國(guó)內(nèi)同類油藏的開(kāi)發(fā)具有借鑒意義。
[Abstract]:Chang6 reservoir in Qilicun Oilfield is a shallow ultra-low permeability reservoir, and the artificial fracture is horizontal fracture after fracturing, and the production effect of straight well is not ideal. In order to improve the development effect, the horizontal section of horizontal well is designed to pass through different flow units longitudinally, and multiple horizontal fractures are formed after fracturing. Based on this idea, the wellbore trajectories of "one" font, high slope type and "bow" type are designed. The development indexes of three kinds of wellbore trajectories are calculated by numerical simulation, and the production effect of "bow" wellbore trajectory is the best. The field test was carried out in well Qiping 1. Six members of the long _ (62o2) reservoir were fracturing, and two groups of horizontal fractures were created in each of the three flow units. The development effect of the horizontal well was obviously improved after the horizontal well was put into operation, and the daily oil production at the initial stage was obviously improved. The cumulative oil production is more than 13.0 times of that of vertical wells in the same area. The test results show that the use of "bow" wellbore trajectory can effectively improve the reserve production degree of horizontal fracture reservoir, which can be used for reference for the development of similar reservoirs in China.
【作者單位】： 陜西延長(zhǎng)石油(集團(tuán))有限責(zé)任公司研究院;延長(zhǎng)油田股份有限公司;
【基金】：陜西省科技統(tǒng)籌創(chuàng)新工程計(jì)劃項(xiàng)目“提高延長(zhǎng)油田主力油層開(kāi)發(fā)效果系統(tǒng)工程關(guān)鍵技術(shù)研究”(2012KTZB01-04)
【分類號(hào)】：TE243

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