摘要
塔河油田缝洞型油藏由于储集体的空间分布、规模大小、储集性能具有较强的非均质性,按照碎屑岩油藏计算方法提交的探明储量具有一定的不确定性。因此从开发的角度,考虑缝洞型油藏的非均质性,利用地震反射特征、地震振幅变化率大小及实钻井的产能差异对提交的探明储量进行了分类评价,把未开发储量划分为落实未开发储量,待评价一类储量、待评价二类储量、待核销储量4个小类,并论述了界定不同类别储量边界的多种技术方法。由于每种技术方法都有一定的局限性,因此需综合利用多种技术方法进行储量的评价。通过对塔河碳酸盐岩缝洞型油藏探明储量的分类评价,能够有效指导开发井位的部署,优先动用优质储量,加强待评价一类储量的评价工作,提高此类油藏的建产率,单井产能及储量动用程度。
The fractured-vuggy reservoirs in Tahe Oilfield are characterized by strong heterogeneity in spatial distribution, size,and quality of reservoirs,thus their proven reserves calculated with method formulated for clastic reservoirs are inaccurate.Therefore,their proven reserves are classified and evaluated based on the seismic reflectance signature,rate of seismic amplitude variation and difference of the measured deliverability among wells.Undeveloped reserves are divided into proved underdeveloped reserves,unevaluated ClassⅠreserves, unevaluated ClassⅡreserves,and reserves to be cancelled after verification.Various approaches are introduced for defining boundaries of reserves of different categories.As each approach has its only limitations,it is necessary to integrate multiple methods for evaluating reserves.These classification and evaluation approaches are used in the fractured-vuggy carbonate reservoirs in Tahe oilfield.The results show that they can effectively guide the emplacement of development wells,give priority to the producing of high quality reserves,strengthen evaluation of the unevaluated ClassⅠreserves,enhance single-well deliverability and ratio of producing reserves.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2011年第4期625-630,共6页
Oil & Gas Geology
关键词
储量分类评价
储量边界
奥陶系
缝洞型油藏
塔河油田
reserve classification and evaluation
boundary of reserves
Ordovician
fractured-vuggy reservoirs
Tahe oilfield
