本文選題：輻射狀多分支井　切入點：耦合模型　出處：《西南石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：輻射狀多分支水平井(簡稱輻射狀多分支井)在開發(fā)多個小塊狀或透鏡體油氣藏、薄油氣藏以及低壓低滲、高黏度稠油藏時能夠提高單井的產(chǎn)能。與常規(guī)水平井相比,其不僅能提高最終的采收率還能節(jié)約投資成本,其對于今后該類油氣藏的開發(fā)具有重要的指導(dǎo)意義。在前人的工作基礎(chǔ)上,本文針對裸眼系列完井方式下輻射狀多分支井的產(chǎn)能模型進行了研究,取得的主要進展及研究成果如下： (1)考慮滲流干擾、井筒管流壓降、鉆完井污染等因素,借助相關(guān)滲流力學(xué)理論、工程流體力學(xué)理論、油藏工程理論和數(shù)值分析理論,運用離散化方法,建立新的穩(wěn)態(tài)耦合產(chǎn)能模型。 (2)與傳統(tǒng)的模型相比,該模型的優(yōu)點為：考慮了鉆完井污染以及完井方式對輻射狀多分支井產(chǎn)能的影響；可對薄層油氣藏進行模擬,并且分析了輻射狀多分支井的產(chǎn)能影響因素。 (3)制定了穩(wěn)態(tài)耦合模型的循環(huán)迭代求解方案,并且編制了《薄層輻射狀多分支井產(chǎn)能計算分析程序》,將現(xiàn)場實例代入程序計算得到了各分支井筒的徑向流率、軸向流量以及井筒流壓數(shù)據(jù),繪制了相應(yīng)的數(shù)據(jù)分布規(guī)律圖。 (4)對數(shù)據(jù)分布規(guī)律圖進行分析,其結(jié)果表明,滲流干擾作用對油藏滲流的影響很大,井筒摩阻會消耗部分生產(chǎn)壓差造成產(chǎn)能降低。所得的規(guī)律對輻射狀多分支井的鉆完井工藝具有實際指導(dǎo)意義。 (5)以上述計算結(jié)果為基礎(chǔ),將本文模型計算所得的產(chǎn)能與傳統(tǒng)的經(jīng)驗公式計算所得產(chǎn)能進行對比,其結(jié)果進一步驗證了本文所建立產(chǎn)能模型的正確性。
[Abstract]:Radial multi-branch horizontal wells can improve the productivity of single wells in the development of multiple small block or lens reservoirs, thin reservoirs, low pressure and low permeability, and high viscosity heavy oil reservoirs. It can not only improve the final recovery factor but also save the investment cost. It has important guiding significance for the development of this kind of oil and gas reservoir in the future. In this paper, the productivity model of radial multi-branched wells under open-hole completion mode is studied. The main progress and research results are as follows:. 1) considering the factors of seepage interference, wellbore pressure drop, well completion pollution and so on, the discretization method is used with the aid of relevant percolation mechanics theory, engineering fluid mechanics theory, reservoir engineering theory and numerical analysis theory. A new steady-state coupling productivity model is established. Compared with the traditional model, this model has the advantages of considering the effects of drilling and completion pollution and completion mode on the productivity of radiative multi-branched wells, and can be used to simulate thin layer oil and gas reservoirs. The factors affecting productivity of radial multi-branch wells are analyzed. In this paper, the cyclic iterative solution of the steady-state coupling model is worked out, and the program for calculating the productivity of thin-layer radiating multi-branched wells is developed. The radial flow rate of each branch wellbore is calculated by using the field example instead of the program. The data of axial flow rate and wellbore flow pressure are plotted. 4) the data distribution pattern is analyzed. The results show that percolation interference has a great influence on reservoir percolation. The friction of wellbore will consume part of the production pressure difference and reduce the productivity. The obtained rule is of practical significance to the drilling and completion process of the radial multi-branch well. 5) on the basis of the above calculation results, the productivity calculated by the model is compared with that calculated by the traditional empirical formula. The results further verify the correctness of the productivity model established in this paper.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE328

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本文編號：1561988