SET OF WELL LOCATION DETERMINATION, DRILLING, COMPLETION, AND PRODUCTION METHODS IN RE-DEVELOPMENT OF A MATURE FIELD

PETRO Pub Date : 2018-08-01 DOI:10.25105/petro.v7i2.3679
H. K. Oetomo
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Abstract

XYZ oil field has been on production for 30 years, and has produced 189 MMBO of oil out of 491 MMBO of Original Oil in Place.  The reservoir consists of reefal limestone carbonate rock.  Initially, oil production was mainly coming from reservoir fracture; while rock matrix acted as secondary porosity.  The field is the largest field in the area, with 40% of recovery factor.  This number is high, but comparing to other fields with the same reservoir flow characteristics in the adjacent area, this number is the lowest.  By increasing recovery factor of 0.5%, it will add 2 MBO of oil reserves, which is still feasible to be further re-developed.  Several last well being drilled were using spesifics methods which are different from previous wells' methods; and the results were successful.  The methods are conventional method which included well location determination by using engineering maps, drilling technique, completion technique and production methods.  The preliminary result of the field re-development yield to 40% water cut wells in the area with wells of 98% water cut.
成熟油田再开发中的一套井位确定、钻井、完井和生产方法
XYZ油田已经投产30年,在4.91亿桶的原始储量中,产量为1.89亿桶。储层由礁灰岩、碳酸盐岩组成。初期,采油主要来自储层裂缝;岩石基质为次生孔隙。该油田是该地区最大的油田,采收率为40%。这个数字很高,但与邻近地区具有相同储层流动特征的其他油田相比,这个数字是最低的。提高采收率0.5%,可增加2 MBO的石油储量,仍有进一步开发的可能性。最近几口井采用了不同于以往的特殊方法;结果是成功的。方法为常规方法,包括利用工程图、钻井技术、完井技术和生产方法确定井位。油田再开发的初步结果表明,该地区的井含水率为98%,井含水率为40%。
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