CAJ | 학술논문

根据中国东部下第三系盐湖相沉积存在的地质实际,利用地层孔隙热压生排烃模拟仪开展了仿真地层条件下的含盐和不含盐泥质烃源岩的生排烃模拟实验,通过对烃类产物的分析探讨了盐类物质参与烃源岩生排烃的过程.研究表明:(1)盐类的存在加速了成烃演化,促进了石油和天然气的生成;(2)盐类的存在降低了对有机质的吸附能力,加速了粘土转化和脱水过程,且盐层易解理,使烃源岩中微孔隙及孔缝发育,促进了油气的初次运移;(3)无盐泥质源岩发育区虽然滞留大量的石油资源,但由于其岩石本身难压裂,对于商业化开采页岩油并无太大意义,到达过成熟阶段后,可能是页岩气开采的有利区带.盐岩发育区虽然其整体演化过程中生成的油气易于排出,但在Ro=1.28%时仍然滞留着20%的石油资源,富含大量的盐类脆性矿物而低含粘土矿物,有利于产生裂缝,易于压裂,是页岩油藏勘探的有利区带.
근거중국동부하제삼계염호상침적존재적지질실제,이용지층공극열압생배경모의의개전료방진지층조건하적함염화불함염니질경원암적생배경모의실험,통과대경류산물적분석탐토료염류물질삼여경원암생배경적과정.연구표명:(1)염류적존재가속료성경연화,촉진료석유화천연기적생성;(2)염류적존재강저료대유궤질적흡부능력,가속료점토전화화탈수과정,차염층역해리,사경원암중미공극급공봉발육,촉진료유기적초차운이;(3)무염니질원암발육구수연체류대량적석유자원,단유우기암석본신난압렬,대우상업화개채혈암유병무태대의의,도체과성숙계단후,가능시혈암기개채적유리구대.염암발육구수연기정체연화과정중생성적유기역우배출,단재Ro=1.28%시잉연체류착20%적석유자원,부함대량적염류취성광물이저함점토광물,유리우산생렬봉,역우압렬,시혈암유장감탐적유리구대.
According to the presence of aalt lake sediments of the Tertiary in the east of China,we make use of hydrocarbon generation and expulsion of pore hot simulation instrument to carry out the simulation under the conditions of formation of salt and no salt argillaceous source rock hydrocarbon generation and expulsion simulation experiments,through the analysis of hydrocarbon products of the salts in hydrocarbon source rocks in the process of hydrocarbon generation and expulsion. The results have shown that:(1)the presence of salts accelerated the evolution of hydrocarbon generation,and promoted oil and gas generation.(2)the presence of salt reduces the adsorption capacity of organic matter,accelerated the process of transformation and dehydration of clay,and promoted the initial operation of oil and gas shift easy cleavage and other reasons,the source rocks in the development of micro-pores and apertures in source rocks.(3)Although there exist a large number of stranded oil resources,salt-free zones in shale source rocks has little value of commercial exploitation because of the difficulties in fracturing. But they may be favorable of shale rock gas exploitation when reaching maturing. Although it is easy to discharge oil and gas generated in the process of evolution of salt rocks,20%of oil resources were still stuck,when Ro=1.28%a large number of salts rich in minerals and low brittleness with clay minerals,are conducive to creating cracks,and are easy for fracturing,which makes salt rock areas favorable shale zones for reservoir exploration.