發(fā)布時間：2019-04-12 17:23

【摘要】：致密砂巖儲層評價方案是識別儲層"甜點(diǎn)"的基礎(chǔ),也是致密油勘探的重點(diǎn)和難點(diǎn),但目前國內(nèi)對此尚無統(tǒng)一認(rèn)識。為此,以松南中央坳陷區(qū)泉四段致密砂巖為例,綜合常規(guī)壓汞、恒速壓汞、高壓壓汞等多種資料對致密儲層微觀孔喉結(jié)構(gòu)進(jìn)行了精細(xì)表征,并以此為基礎(chǔ)建立了致密砂巖儲層評價方案。結(jié)果表明:研究區(qū)致密砂巖孔喉小、物性差,儲集空間以次生溶孔為主;儲層滲透性主要由占小部分體積的最大孔喉半徑所控制,喉道半徑越大、大喉道所占比例越高,致密儲層的滲透率(K)就越高、品質(zhì)就越好。在此基礎(chǔ)上,由孔喉結(jié)構(gòu)的差異性出發(fā),將松南中央坳陷區(qū)泉四段致密砂巖儲層分類4類,其中,石油能夠充注至Ⅰ—Ⅲ類致密儲層,且Ⅰ類致密儲層(K為(0.1~1.0)×10~(-3)μm~2)品質(zhì)最高,可視為儲層"甜點(diǎn)"。
[Abstract]:The evaluation scheme of tight sandstone reservoir is the basis of identifying reservoir "dessert" and the key and difficult point of tight oil exploration, but there is no unified understanding about it in our country at present. Therefore, taking the tight sandstone of the fourth member of Quan formation in the central depression of Songnan as an example, the micro-pore throat structure of the tight reservoir has been characterized in detail by integrating the data of conventional mercury pressure, constant velocity mercury pressure and high pressure mercury pressure and so on. On the basis of this, the evaluation scheme of tight sandstone reservoir is established. The results show that the pore throat of the tight sandstone in the study area is small, the physical properties are poor, and the reservoir space is dominated by secondary dissolved pores. The permeability of the reservoir is mainly controlled by the largest pore throat radius, which accounts for a small part of the volume. The larger the throat radius, the higher the proportion of the large throat, the higher the permeability (K) and the better the quality of the tight reservoir. On the basis of this, based on the difference of pore-throat structure, the tight sandstone reservoirs in Quan-4 member of Songnan Central Depression are classified into four types, in which oil can be injected into 鈪，

本文編號：2457219