The main factors influenced fractures development are the tectogenesis , the physical weathering and the chemical dissolution 影響裂縫發(fā)育的主要因素是構(gòu)造、物理風(fēng)化和化學(xué)淋溶作用。
Huge deep fractures in the east of china have a little influence on the pore of carbonatite reservoir of ? - o stratum in the regions of zhuangxi and chengdao . the karstification which probably happened at xishan tectogenesis period is also very limited 我國(guó)東部深大斷裂對(duì)樁西、埋島地區(qū)寒武一奧陶系碳酸鹽巖的儲(chǔ)層孔隙影響很小,可能發(fā)生在喜山期的巖溶作用(深部流體帶來(lái)的巖溶作用)也是十分有限的。
The mainly reservoirs in the middle of damintun depression of liaohe basin are the regional metamorphic rocks and the migmatites , which are more fractured and rigid by the cataclastics . the space of metamorphite is the mainly fractures , which are produced by the tectogenesis and the physical weathering 2 、遼河大民屯中部地區(qū)主要儲(chǔ)集巖是太古界的區(qū)域變質(zhì)巖和混合巖類(lèi),尤以裂縫發(fā)育和經(jīng)過(guò)碎裂化的剛性變質(zhì)巖類(lèi)的儲(chǔ)集性能最佳。
This is the direct reason of bad reservoir property of sandstone , especially lower permeability . the influence and control factors of reservoirs include : deposition , diagenesis and tectogenesis . the deposition is the basic factor , it control the shape and distribution of sand body , and influence the type and the intensity of the diagenesis ; the diagenesis is the key factor , it control the process of pore evolvement , so the diagenesis control the sandstone ' s storage space and reservoir quality directly ; the fracture of the tectogenesis formation could improve the porosity and permeability of sandstone 其中沉積作用是基礎(chǔ),控制了儲(chǔ)集砂體的形態(tài)特征和分布范圍,同時(shí)由于不同沉積類(lèi)型砂體在碎屑成分組成、泥質(zhì)含量、顆粒粒度、砂體厚度、砂體內(nèi)部的非均質(zhì)性、孔隙介質(zhì)的物理化學(xué)性質(zhì)等方面不盡相同,從而也影響著砂巖所經(jīng)歷的成巖作用路徑、類(lèi)型和強(qiáng)度,因此沉積作用是控制儲(chǔ)層發(fā)育的主導(dǎo)因素;成巖作用是關(guān)鍵,直接決定了砂巖的孔隙演化過(guò)程,從而決定了儲(chǔ)層內(nèi)部?jī)?chǔ)集空間特征和儲(chǔ)集性能;而構(gòu)造作用形成的裂縫對(duì)改善砂巖的儲(chǔ)滲性能具有一定作用。