基于岩屑数字定量分析的高探1井储层特征参数评价

Evaluation of reservoir characteristics parameters of well Gaotan-1 based on quantitative analysis of cuttings

2019年1月,准噶尔盆地南缘四棵树凹陷高探1井取得重大突破,日产千方油气流也创造了创国内陆上碎屑岩产量纪录.为获取第一手储层特征参数实验数据,筛选代表性岩屑,利用岩屑数字定量分析技术开展数字岩心实验.实验评价表明,高产段储层孔隙度14%~19%、渗透率850~1150 mD(1 mD=0.987×10^-3μm^2),为中孔高渗储层;获得岩电关键参数a=0.95,m=1.95,b=1,n=2.21,解释含油饱和度55%~75%;杨氏模量19~20 GPa,泊松比0.319~0.330.基于岩屑数字定量分析的储层特征参数评价技术,在高温超高压油藏储层评价及其他类似领域具有较好的应用前景.

In January 2019,the high exploration well 1 of Sikeshu sag in the southern margin of Junggar basin made a major breakthrough,and the daily oil and gas flow volume of thousand cubic meters also set a record for the production of upper clastic rock in inland China.In order to obtain the first-hand experimental data of reservoir characteristic parameters,digital core experiment is carried out by selecting representative cuttings and using cuttings digital quantitative analysis technology.The experimental evaluation shows that the reservoir with porosity of 14%~19%and permeability of 850~1150 mD is a medium porosity and high permeability reservoir;the key parameters of rock electricity are obtained,parameter"a"is 0.95,parameter"m"is 1.95,parameter"b"is 1,parameter"n"is 2.21″and the oil saturation is explained of 55%~75%;Young’s modulus is 19~20 GPa,Poisson’s ratio is 0.319~0.330.The evaluation technology of reservoir characteristic parameters based on digital quantitative analysis of cuttings has a good application prospect in high temperature and ultra-high pressure reservoir evaluation and other similar fields..