本文選題：低效低產(chǎn)　切入點：儲層評價　出處：《東北石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：油層出砂是砂巖油層開采過程中的常見問題之一。對于疏松砂巖油藏,出砂是提高采油速度的主要障礙。我國疏松砂巖油藏分布范圍廣、儲量大,產(chǎn)量占有重要的地位,這類油藏開采中的主要矛盾之一是油井出砂。既提高了原油生產(chǎn)成本,又增加了油田開采難度。因此,油井防砂工藝技術(shù)的研究和發(fā)展對疏松砂巖油藏的順利開發(fā)至關(guān)重要。針對洼25新12井區(qū)儲層特征進行研究評價,以找出停產(chǎn)、低產(chǎn)原因,達到提高油井上產(chǎn)、增產(chǎn)的目的,實現(xiàn)低成本高效益。同時建立一套適用于遼河特點的低效油氣井開發(fā)技術(shù)管理模式。本文對該儲層進行了四方面的研究,確定洼25-新12井區(qū)油層為稠油油斑細(xì)砂巖,巖石顆粒間以點接觸為主,孔隙接觸式膠結(jié),屬中孔高滲。膠結(jié)物為泥質(zhì)膠結(jié),泥質(zhì)含量較高。在油井生產(chǎn)時,在地層流體的拖拽作用下,地層極易遭到破壞,導(dǎo)致油井出砂。針對地質(zhì)特征進行出砂原因分析,確定該井區(qū)油井出砂的四個因素:儲層特性決定油層出砂;粘土礦物水化膨脹;原油粘度大,攜砂力強;地層砂蒸汽溶蝕變細(xì)。對以往防砂技術(shù)回顧及效果分析,在相鄰區(qū)塊的成功防砂經(jīng)驗基礎(chǔ)上,確定了洼25新12井區(qū)的主體防砂工藝為壓裂防砂。文中還對壓裂防砂技術(shù)的實施做了明確的要求,并對樹脂覆膜砂進行了改進試驗。經(jīng)現(xiàn)場應(yīng)用證明,采用壓裂防砂能夠解決小洼油田(含洼25新12井區(qū)),海外河油田的低產(chǎn)低效井出砂問題。
[Abstract]:Sand production in reservoir is one of the common problems in sandstone reservoir production. Sand production is the main obstacle to improve oil recovery rate in unconsolidated sandstone reservoirs. The loose sandstone reservoirs in China have a wide distribution range, large reserves, and production plays an important role. One of the main contradictions in the exploitation of this kind of reservoir is the sand production of oil wells, which not only increases the production cost of crude oil, but also increases the difficulty of oil production. The research and development of sand control technology is very important for the development of loose sandstone reservoir. The reservoir characteristics of WA 25 Xin12 well area are studied and evaluated in order to find out the cause of shutdown and low production, so as to increase oil well production and increase production. In order to realize low cost and high benefit and set up a set of low efficiency oil and gas well development technology management model suitable for Liaohe characteristics, this paper studies the reservoir in four aspects, and determines that the reservoir in WA25- Xin12 well area is heavy oil patch fine sandstone. The contact between rock particles is mainly point contact, pore contact cementation, which belongs to medium porosity and high permeability. The cementation is muddy, and the content of clay is high. During the production of oil wells, the formation is liable to be destroyed under the tug action of formation fluid. According to geological characteristics, four factors of sand production in the well are determined: reservoir characteristics determine sand production in oil reservoir, hydration expansion of clay minerals, high viscosity of crude oil and strong sand carrying capacity; Steam dissolution and thinning of formation sand. Review of previous sand control technology and analysis of its effect, on the basis of successful sand control experience in adjacent blocks, It is determined that the main sand control technology in WA 25 Xin12 well area is fracturing sand control. In this paper, the specific requirements for the implementation of fracturing sand control technology are made, and the improvement test of resin coated sand is carried out, which is proved by field application. Sand control by fracturing can solve the problem of sand production in low production and low efficiency wells in Xiaowa Oilfield (well No. 12 with WA 25) and in Offshore River Oilfield.
【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】：TE358.1

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本文編號：1613621