陆东-五彩湾地区石炭系火山岩气藏勘探进展

为进一步加大对准噶尔盆地石炭系火山岩这一新型储层的研究力度，依据前人的认识和勘探成果，通过对该盆地陆东-五彩湾地区火山岩岩性特征、生烃潜力、储盖组合的深入研究，结合多种资料的分析结果，建立了该区的岩性岩相识别模式，划分了有利火山岩分布范围，开展了整体研究，并优选目标实施钻探获得了成功。以滴南凸起为主攻目标，其中，滴西14井是整体解剖滴南凸起后优选钻探的第一口预探井。该井射开石炭系压裂后，获日产天然气16×10⁴ m³的高产工业气流，发现了滴西14井石炭系火山岩天然气藏。该气藏属基岩块状气藏，依据岩相识别模式圈定含气面积37 km²，预测天然气地质储量642×10⁸ m³。

PROGRESS OF GAS EXPLORATION IN CARBONIFEROUS IGNEOUS ROCKS IN LUDONG-WUCAIWAN AREA, THE JUNGGAR BASIN

In order to gain deeper insights into the Carboniferous igneous rock reservoirs in the Junggar basin, in depth studies were performed in respects of petrographic characteristics, hydrocarbon generating potential and reservoir seal combination of the igneous rocks in Ludong Wucaiwan area based on previous understandings and exploration results. Various data were integrated to build up models for identifying lithology and facies, to delineate the distribution of the favorable igneous rocks, and to select targets for exploratory drilling. The Dinan uplift zone was selected as the primary exploration target, where the well Dixi 14, the first exploratory well placed based on a thorough study of the Dinan uplift, obtained a breakthrough. High rate commercial gas flow of 160000 m3/d was tested in this well after the Cretaceous reservoirs were perforated and stimulated through fracturing, leading to the discovery of Dixi 14 Cretaceous igneous rocks gas reservoir. It is a massive basement gas reservoir and has a gas bearing area of 37 km2 delineated based on facies identification models and predicted gas in place of 64.2 bcm.