摘要
依据岩溶及裂缝的发育状况 ,济阳坳陷下古生界潜山储集体可分为拱张褶皱型、断裂块断型、风化残丘型和多期构造复合型 4种类型。第一、二类主要储集空间为裂缝溶蚀孔洞 ,储层段双侧向电阻率较低 ,声波时差常出现跳波现象 ;第三类的储集空间为岩溶残丘 ;第四类具有上述复合组成的特征。在济阳坳陷下古生界 ,拱张褶皱型储集体主要发育于褶皱山风化壳 ,岩溶作用垂直分带现象明显。断裂块断型储集体在有上古生界覆盖的情况下 ,岩溶带大面积成层发育、依次递进 ;在无覆盖时 ,风化壳岩溶带的溶蚀孔、洞、缝极为发育。风化残丘型储集体在整个残丘山均有发育。多期构造复合型的露头区是储层发育的有利区 ,岩溶带垂直发育。
According to the development of fissures and karsts, Jiyang depression can be divided into four types of arched-extension fold, fractured-block fault, weathered- remaining hillock and multi-phases structure \{composite.\} Reserving space for the first and second type above mentioned are mainly fissures - dissolution cavities, \{electric\} resistances in both flanks of reserving intervals are lower, and time difference of the sound wave often jumps; Space for the third type are karst-remaining hillocks; The fourth type represents features of above multi-\{compositions.\} In the lower Palaeozoic in Jiyang depression, reservoirs(bodies) in arched-extension fold type are mainly developed on the weathered crusts of the folded- mountain with evidence of de-zoning vertically of the karst effect. In the case of reservoirs in fractured-block fault type covered by the upper Palaozoic roof rocks, the karst belts are developed in stratification and progressing in sequence in large area. In the case of those uncovered by the Upper Palaozoic roof rocks, dissolution cavities, holes and fissures are well developed. Reservoirs in weathered- remaining hillock type are commonly developed on the whole remaining hillock-mountain. Outcrop area in reservoirs in multi-phases structure composite type is a favorable area for the development of reservoir and with the vertical development of the karst belt.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2002年第3期248-251,256,共5页
Oil & Gas Geology
