碳酸盐岩洞穴型储层试井解释新模型  

New model of well test interpretation in cavernous carbonate reservoirs

作　　者：蔡明金[1,2] 张福祥[2] 杨向同[2] 彭建新[2] 牛新年[2] 

机构地区：[1]西南石油大学,四川成都610500 [2]中油塔里木油田分公司,新疆库尔勒841000

出　　处：《特种油气藏》2014年第2期98-101,155-156,共4页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"塔里木盆地台盆区海相碳酸盐岩油气成藏条件;有利区带评价与勘探目标优选研究"(2008ZX05004-004);中国博士后科学基金项目"基于物质平衡与不稳定试井理论的非均质气藏早期动态预测方法"(2011M500403);中国博士后科学基金第五批特别资助项目"洞穴-裂缝孔洞型油气藏动态描述理论及应用"(2012T50140)

摘　　要：针对塔里木盆地奥陶系大型洞穴碳酸盐岩油气藏,以渗流和空腔流为基础,采用裂缝孔洞型储层渗流与洞穴空腔流动相结合的方法,建立并求解试井数学模型。研究表明,大型洞穴油气藏早期压力导数曲线将出现一个凹子,其深浅受洞穴大小及与井筒距离影响:洞穴越大,与井筒距离越近,凹子越深。之后,压力及其导数曲线呈现平行直线,表现为裂缝流特征。该研究为大型洞穴碳酸盐岩油气藏勘探开发提供了理论及技术支持。For the large Ordovician cavernous carbonate reservoirs in the Tarim basin,a mathematic model of well test is established and solution is derived by means of integration of peculation in fractured and cavernous reservoir and flow in cavity on the basis of peculation and cavity flow. It is indicated from research work that a concave tends to be present in the early pressure derivative curve of large cavernous reservoir,of which the amplitude is affected by the cavern size and the distance to wellbore: the larger is the cavern and the closer is to wellbore,the deep is the concave. Subsequently,pressure and its derivative curve are present as parallel straight lines,showing a feature of flow in fracture. This research work provides theoretical and technical support to the exploration and development of large Ordovician cavernous carbonate reservoirs.

关 键 词：碳酸盐岩 试井解释 空腔流 洞穴 双孔复合 

分 类 号：TE33[石油与天然气工程—油气田开发工程]