【摘要】：隨著科學(xué)技術(shù)的進步,油氣開發(fā)領(lǐng)域也有了多次技術(shù)革新。其中,水平井技術(shù)的提出和發(fā)展具有深遠的意義。水平井的優(yōu)缺點都十分鮮明,優(yōu)點在于水平井能增加產(chǎn)層的泄油面積,可在較低生產(chǎn)壓差下開發(fā)油藏,提高采油效率,增加可采儲量；水平井開發(fā)的一個典型缺陷在于井身與油藏平行,使水平井很容易大量產(chǎn)水,水平井產(chǎn)水會使產(chǎn)油量驟減,含水急劇上升,甚至導(dǎo)致整個油井“水淹”。如何有效的控水成為水平井開發(fā)的關(guān)鍵。 Qx油田屬于底水油藏,大規(guī)模采用水平井開采,采取合理有效的控水措施將直接影響油田開發(fā)效果。底水油藏水平井控水分為先期控水和后期控水,先期控水主要從完井方式、工作制度和油藏工程等方面出發(fā)；后期控水結(jié)合油田實際可以采取定位封隔或籠統(tǒng)堵水等方式。Qx油田控水需求主要體現(xiàn)在兩個方面,一方面是油田即將布置新的水平井加密井,需要編制合理的先期控水方案；另一方面是現(xiàn)階段的水平井生產(chǎn)井含水率高,亟待采取穩(wěn)油降水的措施。本文從底水油藏出水機理出發(fā),分析和對比了影響底水油藏底水脊進的各種因素,編制了針對QX油田的先期控水方案,并對后期控水進行重點研究。后期控水與水平井產(chǎn)液剖面密切相關(guān),結(jié)合Qx油田實際,推薦連續(xù)油管產(chǎn)液剖面測試進行找水作業(yè)。對比各種后期控水方法,選擇性化學(xué)堵水最能滿足QX油田的控水需求。針對Qx油田實際,優(yōu)選出KYPAM和檸檬酸鋁交聯(lián)體系作為堵劑,并結(jié)合正交試驗確定堵劑最佳配方：KYPAM的濃度為3000mg/L, KYPAM/A1+3為8,溫度為58℃、礦化度4500mg/L和pH值為7。并對選擇性堵劑進行封堵性能和選擇性封堵效果評價,最終選擇Q33井編制合理的施工方案,為選擇性堵劑的現(xiàn)場應(yīng)用做準備。
[Abstract]:With the progress of science and technology, there have been many technological innovations in the field of oil and gas development. Among them, the proposal and development of horizontal well technology is of far-reaching significance. The advantages and disadvantages of horizontal well are very distinct, the advantage is that horizontal well can increase the oil discharge area of production layer, can develop reservoir under low production pressure difference, improve oil production efficiency and increase recoverable reserves; a typical defect of horizontal well development is that the well body is parallel to reservoir, so that horizontal well can easily produce a large amount of water, horizontal well water production will make oil production plummet, water cut will rise sharply, and even lead to "flooding" of the whole oil well. How to control water effectively becomes the key to horizontal well development. Qx oil field belongs to bottom water reservoir. Horizontal well production is adopted on a large scale. Reasonable and effective water control measures will directly affect the development effect of oil field. The horizontal well water control in the bottom water reservoir is the early water control and the later water control, the early water control mainly starts from the completion mode, the working system and the reservoir engineering, etc. The later water control combined with the oil field can adopt the positioning sealing or general water shutoff and so on. The water control demand of QX oil field is mainly reflected in two aspects. On the one hand, the oil field is about to arrange new horizontal well infill wells, so it is necessary to compile a reasonable advance water control scheme. On the other hand, the water cut of horizontal well production well is high at present, so it is urgent to take measures to stabilize oil precipitation. Based on the effluent mechanism of bottom water reservoir, this paper analyzes and compares various factors affecting the advance of bottom water ridge in bottom water reservoir, compiles an early water control scheme for QX oil field, and focuses on the study of water control in the later stage. The later water control is closely related to the liquid production profile of horizontal wells. Combined with the actual situation of Qx oil field, it is recommended to test the liquid production profile of coiled tubing for water exploration. Compared with various later water control methods, selective chemical water shutoff can best meet the water control needs of QX oil field. In view of the actual situation of Qx oil field, the crosslinked system of KYPAM and aluminum citrate was selected as blocking agent, and the optimum formula of blocking agent was determined by orthogonal test: the concentration of KYPAM was 3000 mg / L, KYPAM/A1 3 was 8, the temperature was 58 鈩，

本文編號：2499388