大庆徐深气田火山岩气藏的开发

DEVELOPMENT OF VOLCANIC ROCK RESERVOIRS IN THE XUSHEN GAS FIELD IN DAQING

2002年,随着徐深1井在火山岩中获得高产工业气流,揭开了大庆深层火山岩气藏勘探开发的序幕。目前,大庆徐深气田已具有2000×108m3天然气储量规模,其中火山岩储集层储量占86.4%,成为我国东部陆上发现的最大气田。火山岩储集层由于受喷发期次、剥蚀改造等影响,岩性与储集空间复杂,储集层非均质性强,相邻气井产能差别大,对于火山岩气藏开发,国内外几乎没有可以借鉴的经验。近年来组织了科研攻关,针对火山岩气藏的特点开展了综合地质、气藏工程、钻采工艺多学科联合攻关,对火山岩地质和气藏工程取得了一定的成果和认识,形成了一套适用于火山岩气藏开发技术,为火山岩气藏的高效、快速开发奠定了基础,为我国在火山岩气藏开发技术方面积累了有益的经验。

High-yielding industrial natural gas flow has been tested in the well Xushen-1 in 2002,which uncovered the prelude of the exploration and development for deep volcanic rock reservoirs in Daqing. Up to now,the reserves in this area has already reached up to 200 bcm,in which volcanic rock reservoirs account for 86.4%. So far,the Xushen gas field is the largest gas field discovered onshore in East China. Due to the effects of eruption periods and erosion transformation,the volcanic rock reservoir is characterized by complicated lithology,complex storage spaces,high heterogeneity,and large variations between offset wells in gas productivity. There is hardly any experience to be used for reference in China and in other countries on development of this kind of reservoirs. In recent years,joint scientific study has been conducted in fields of comprehensive geology,gas reservoir engineering,drilling and production technology based on the features of the volcanic rock reservoirs. New understandings and knowledge have been formed,and a set of applicable development technology has been established for fast and effective development of that kind of reservoirs. Related valuable experiences have been drawn from field practices.