异常高压凝析气藏水侵量及水体大小计算方法  

An approach to calculate water influx and aquifer region of abnormally high pressure condensate gas reservoir

作　　者：吴克柳[1,2] 李相方[1] 范杰[1] 李艳静[3] 吴凌[1] 

机构地区：[1]中国石油大学石油工程教育部重点实验室,北京102249 [2]加拿大卡尔加里大学化学与石油工程学院 [3]中国石油集团东方地球物理勘探有限责任公司研究院油气评价开发所,河北涿州072751

出　　处：《中国矿业大学学报》2013年第1期105-111,共7页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50974128);国家科技重大专项(2011ZX05030-005-04)

摘　　要：异常高压凝析气藏的复杂性,给水侵量及水体大小的准确计算造成了极大困难.综合考虑开发过程中的凝析油析出,岩石、束缚水和凝析油弹性膨胀,水相挥发,凝析气相中水蒸汽增多,水溶气溢出及边底水的推进等复杂物理现象,根据物质平衡原理,建立了异常高压有水凝析气藏物质平衡方程,推导了水侵量及水体大小计算公式,并进行了水侵量计算影响因素敏感性评价.实例计算表明:中国某凝析气藏开发16a后,水侵量为1 273.10万m3,水体体积为162 335.18万m3,如果忽略凝析油,计算的水侵量偏大,误差高达70.980%,其次是弹性膨胀的影响,误差为10.469%,而水蒸汽为1.098%与溢出水溶气为0.696%,影响较小,但也不可忽略.Water influx and aquifer region are very difficultly to get accurate calculated value by the complexity of abnormal high pressure condensate gas reservoirs. In this study,a new material balance equation for this type of reservoir was established which considering retrograde condensation, the expansion of rock, bounded water and condensate oil, the phase change of vapor and dissolved gas, water influx. Formulas for calculating water influx and aquifer region were derived,and sensitivity factors of water influx calculation were evaluated. Based on the case study in condensate gas reservoir in China,calculated water influx is 1 273.10× 10^4 m3 ,and aquifer region is 162 335.18× 10^4 m3 after 16 years development. The error of water influx es- timation is up to 70. 980% if oil condensate is not considered. Secondly,the error is 10. 469% of expansion. The effect of gas escape from the dissolution andvapor are not significant but also cannot be neglected,the error are 0. 696% of escaped gas and 1. 098% of vapor.

关 键 词：异常高压 凝析气藏 水侵量 物质平衡方程 反凝析 

分 类 号：TE372[石油与天然气工程—油气田开发工程]