欢103块难采储量潜力评价及部署方案

发布时间：2018-07-24 11:14

【摘要】：随着油田开发时间的推移,井下地层开始亏空,压力逐渐降低,要保证油井的持续稳产,就一定要增加地层压力来保证油井的正常生产。二次采油是油田开发的必经之路,是保持油田高产稳产、提高采收率的途径之一。特别是进入开发中后期的老油田,常规区块挖潜能力有限,油田注水开发是技术密集型系统工程,注水开发方案是油田开发的纲领性文件,与油田开发的经济技术效果有必然联系,特别是对一些难动用区块进行开发,需要通过注水、注气等一系列工艺技术,将难动用区块的油气开采出来,从而提高油田产量。针对辽河油田欢103区块的地质情况,目前主要通过给地层注水等方式进行开采。欢103区块位于欢喜岭下台阶,区块断层比较发育,在北东向的欢4—齐133主干断层及近东西向断层作用下,形成了一系列的断块。目前该区块共有油井16口,其中有15口油井位于杜家台油层。截止2012年12月,欢103块杜家台油层共有油井10口,正常开井1口,捞油2口,平均每天原油产量为0.7t,不含水,累积产油6.07×104t,累积产水1.51×104m~3,累产气4164.0×104m~3。欢103块平均单井初期日产油11.5t,欢103井日产能力最高,为51.9t。统计区块12口压裂投产井初期日产、采油强度及阶段产油量可以看出,多数油井在投产初期有一定的产能。其中初期日产油超过20t的油井1口,超过10t的油井4口。但采油强度较低,超过1 t/(d·m)的油井只有2口,说明油井的供液能力不足。另外,该区块边底水能量较弱,且无注水井为地层补充能量,因此油井产量递减较快。因此依据油藏特点,转变开发方式,通过开展注水,从而提高储层动用程度,改善开发效果。
[Abstract]:With the development time of oil field, the downhole formation begins to deficit and the pressure decreases gradually. In order to ensure the sustained and stable production of oil wells, the formation pressure must be increased to ensure the normal production of the wells. Secondary oil recovery is the only way to develop oil field. It is one of the ways to maintain high and stable oil production and improve oil recovery. Especially for the old oil fields in the middle and late stages of development, the ability of tapping potential in conventional blocks is limited, the oilfield water injection development is a technology-intensive system engineering, and the water injection development scheme is a programmatic document for oil field development. It is necessary to develop some hard-to-produce blocks by a series of technology, such as water injection and gas injection, in order to improve the oil and gas production. According to the geological condition of Huan103 block in Liaohe Oilfield, the main way of exploitation is to inject water into the formation. Block Huan103 is located on the lower steps of Huanxiling and the block faults are relatively developed. A series of fault blocks have been formed under the action of the main fault of Huan4Qi 133 in the NE direction and the near east-west fault. Currently, there are 16 oil wells in the block, 15 of which are located in Dujiatai reservoir. As of December 2012, there were 10 oil wells in Huan103 Dujiatai reservoir, 1 well opened normally and 2 wells were fished. The average daily crude oil production was 0.7 t, with no water content, cumulative oil production 6.07 脳 10 4 t, cumulative water production 1.51 脳 10 4 m ~ (3) and cumulative gas production 4164.0 脳 10 4 m ~ (3). The average daily oil production of Huan103 block is 11.5t at the initial stage of single well, and the daily production capacity of Huan103 well is the highest (51.9 t). The daily production of 12 fracturing wells in the statistical block, the oil recovery intensity and the oil production at the stage can be seen that most wells have certain productivity at the early stage of production. Among them, one oil well with daily production of more than 20 tons at the initial stage and four wells with more than 10 tons of oil production. But the oil recovery intensity is low, there are only 2 wells with more than 1 t / (d m), which indicates that the oil well has insufficient fluid supply capacity. In addition, the energy of the edge and bottom water in this block is weak, and no injection well is used to replenish the formation energy, so the oil well production decreases rapidly. Therefore, according to the reservoir characteristics, change the development mode, through the development of water injection, so as to improve the reservoir production degree and improve the development effect.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357

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