【摘要】：本文針對(duì)薩中開(kāi)發(fā)區(qū)多套層系、多套井網(wǎng)共同開(kāi)發(fā)進(jìn)行研。目前研究區(qū)已進(jìn)入特高含水后期開(kāi)發(fā)階段。各區(qū)塊水驅(qū)層系每套井網(wǎng)均有各自的開(kāi)采層系及開(kāi)采對(duì)象,同層系內(nèi)各沉積單元油層發(fā)育狀況差異較大。因此,同層系不同井網(wǎng)間布井方式、注采井距、射孔狀況均不相同,致使各層系井網(wǎng)注采系統(tǒng)還不完善,有些油層的水驅(qū)控制程度還較低。因此對(duì)層系井網(wǎng)優(yōu)化調(diào)整技術(shù)進(jìn)行研究,找到滿足現(xiàn)階段高效開(kāi)發(fā)的層系井網(wǎng)調(diào)整方式,以及適合中長(zhǎng)期開(kāi)發(fā)的層系井網(wǎng)調(diào)整方向。其次根據(jù)研究區(qū)油藏地質(zhì)特點(diǎn)以及開(kāi)發(fā)現(xiàn)狀,利用Petrel軟件對(duì)研究區(qū)進(jìn)行精細(xì)地質(zhì)建模,建立構(gòu)造模型、沉積相模型和孔滲飽等屬性模型。縱向上,每個(gè)沉積單元作為一個(gè)模擬層,共有92個(gè)層,平面上步長(zhǎng)為20m×20m,總網(wǎng)格數(shù)為102.45×104個(gè)。對(duì)研究區(qū)儲(chǔ)量進(jìn)行擬合,為后續(xù)井網(wǎng)調(diào)整提供物質(zhì)基礎(chǔ)。利用Eclipse數(shù)值模擬軟件進(jìn)行了數(shù)值模擬研究,對(duì)全區(qū)592口井的產(chǎn)液量、含水率、注水量等指標(biāo)進(jìn)行歷史擬合。對(duì)研究區(qū)各沉積單元的剩余油飽和度場(chǎng)以及調(diào)整前期的剩余油分布規(guī)律進(jìn)行研究。總體上,主力油層累產(chǎn)油量較少,剩余儲(chǔ)量仍然比較大,仍有相當(dāng)?shù)耐跐摑摿?為井網(wǎng)調(diào)整提供物質(zhì)基礎(chǔ)�；谟筒毓こ�、數(shù)值模擬方法以及經(jīng)濟(jì)評(píng)價(jià)理論,計(jì)算出層系井網(wǎng)經(jīng)濟(jì)技術(shù)界限,結(jié)果表明(1)在單井完鉆井費(fèi)用為230萬(wàn)元,原油價(jià)格為40美元/桶時(shí)的可采儲(chǔ)量下限為6299.79t,井距為250m時(shí),單井有效厚度下限2.69m,井距為125m單井有效厚度下限10.76m,井距為300m單井有效厚度下限為1.87m。(2)滲透率級(jí)差控制在3.5-4.5以內(nèi)。(3)飽和度級(jí)差控制在1.1-1.12以內(nèi)。(4)同一層系內(nèi)油層數(shù)控制在10-20以內(nèi)。(5)生產(chǎn)井跨度應(yīng)該小于100m,才能有效的減小生產(chǎn)井段跨度帶來(lái)的干擾。基于層系重組界限的研究成果,設(shè)計(jì)層系重組以及井網(wǎng)重構(gòu)的方案,層系重組方案,GI1-20層系,開(kāi)采GI所有油層。GII1-26以下層系,開(kāi)采GI18以下油層。GII27-GIV18,開(kāi)采GII部分油層以及GIII、GIV所有油層。設(shè)計(jì)的井網(wǎng)重構(gòu)方案,GI1-GI20層系、GII1-GII26層系采用300m井距反九點(diǎn)法井網(wǎng),GII27及以下層系調(diào)整為106m井距的五點(diǎn)法井網(wǎng)。布署總井?dāng)?shù)為592口,其中新鉆井409口。新鉆井共需要壓裂87口,酸化10口,并對(duì)調(diào)整方案進(jìn)行開(kāi)發(fā)效果評(píng)價(jià)與預(yù)測(cè)。通過(guò)本文的研究確定了一套適合薩中開(kāi)發(fā)區(qū)中區(qū)東部高臺(tái)子油層層系組合的界限并設(shè)計(jì)出一套適合其開(kāi)發(fā)的井網(wǎng)部署方案,對(duì)于薩中開(kāi)發(fā)區(qū)高臺(tái)子油層有效開(kāi)發(fā)具有一定意義。
[Abstract]:This paper aims at the development of multi-layer system and multi-set well pattern in Sazhong Development Zone. At present, the research area has entered the stage of development in the late stage of super high water cut. Each set of well pattern has its own production system and exploitation object in each block, and the reservoir development of each sedimentary unit in the same layer system is quite different. Therefore, different well patterns, injection / production spacing and perforation conditions are different in the same layer system, resulting in imperfect injection-production system and low water drive control degree in some reservoirs. Therefore, the optimization and adjustment technology of well pattern is studied to find out the adjustment mode of well pattern for high efficiency development at present, and the adjustment direction of well pattern suitable for medium and long term development. Secondly, according to the geological characteristics of reservoir and the present situation of development in the study area, the fine geological model of the study area is established by using Petrel software, and the attribute models such as structural model, sedimentary facies model and pore and permeability saturation are established. Longitudinally, each sedimentary unit acts as an analog layer, with 92 layers. The step size on the plane is 20m 脳 20m, and the total mesh number is 102.45 脳 104. The reserve of the study area is fitted to provide the material basis for the subsequent well pattern adjustment. The Eclipse numerical simulation software was used to simulate the fluid production, water cut and water injection rate of 592 wells in the whole area. The remaining oil saturation field of each sedimentary unit in the study area and the remaining oil distribution in the early stage of adjustment were studied. On the whole, the accumulated oil production of the main reservoir is relatively small, the remaining reserves are still relatively large, and there is still considerable potential for tapping potential, which provides the material basis for well pattern adjustment. Based on reservoir engineering, numerical simulation method and economic evaluation theory, the economic and technical limits of well pattern are calculated. The results show that: (1) the drilling cost of single well is 2.3 million yuan. The lower limit of recoverable reserves is 6299.79 t when the price of crude oil is 40 US dollars / barrel, and the well spacing is 250 m. The effective thickness lower limit of single well is 2.69 m, well spacing is 125m, effective thickness limit of single well is 10.76 m, and effective thickness limit of single well is 1.87 m. (2) permeability difference is controlled within 3.5-4.5. (3) saturation difference is controlled within 1.1-1.12. (4) the number of oil layers in the same series is controlled. (5) the span of production well should be less than 100m, which can effectively reduce the interference caused by the span of production well. Based on the results of the research on the boundary of the series recombination, the author designs the scheme of the series recombination and well pattern reconstruction. The plan of the series reorganization is the GI1-20 series, the production of all the layers. GII1-26 of GI, the production of the oil layer. GII27-GIV18 below GI18, the production of some oil layers of GII and all the oil layers of GIIII-GIV. The GI1-GI20 system of GI1-GII26 is designed to adopt the five-spot well pattern with 300m interval in reverse nine-spot well pattern GII27 and below 106m well spacing. The total number of wells deployed was 592, of which 409 were new drilling. A total of 87 fracturing and 10 acidizing wells are needed for new drilling, and the development effect of the adjustment scheme is evaluated and forecasted. Through the study of this paper, a set of limits suitable for the combination of Gaotaizi oil series in the eastern part of Sazhong Development Zone is determined and a set of well pattern deployment scheme suitable for its development is designed, which is of certain significance for the effective development of the Gaotaizi Reservoir in the Sazhong Development Zone.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE324

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