And there must be a permeable reservoir rock, such As sandstone or porous limestone, to provide pAssage and storage for the oil and gAs. 所以在附近就必须具有透水的储存岩石,如砂岩和具孔隙的石灰岩,为石油和天然气提供通道和贮存场所。
Distributed in extensive areas, Tertiary algal limestone reservoirs in Qaidam Basin are the most important oil and gas reservoirs in the Tertiary carbonate rock reservoirs in the basin. 柴达木盆地第三系藻灰岩储层分布较广,是柴达木盆地第三系碳酸盐岩储层中最重要的油气储层。
The central uplift of the southern Yellow Sea is the eastward extension of the Jianhu uplift in the northern Jiangsu basin, in which Sinian-Triassic marine limestone oil-gas accumulations are potential targets of oil and gas exploration. 南黄海中部隆起带是苏北盆地建湖隆起的东向延伸,其震旦系&三叠系海相碳酸盐岩油气藏为潜在的勘探目标区;
The results showed that the surface property of oil-wet limestone reservoir changed towards that of water-wet reservoir greatly, and the capabilities of capillary imbibition, water storage and oil displacement were enhanced by using CTAB. The efficiency of cyclic water-flooding could be improved considerably. 结果表明,CTAB可使油湿灰岩储层的表面性质发生明显变化,基质毛管的自吸及滞水排油能力增强,周期注水开发效果明显改善。
Sandstone and limestone are the main targets cut by oil and gas well drilling and for their physical mechanical property there have been systematic determination method and quantitative gradation. 砂岩和石灰岩是石油天然气钻井破岩的主要对象,它的物理力学性质已有系统的测定方法和定量分级。
Cave and cleft in karst limestone are the main oil-bearing space of Ordovician oil poor in Tahe oil field, the develop level of ancient karst controlled the formation oil pool in Ordovician reservoir. 塔河油田奥陶系油藏储集空间以碳酸盐岩岩溶孔洞缝为主,古岩溶发育程度对奥陶系油气成藏有重要的控制作用。
For naturally fractured low permeable limestone reservoirs, the oil displacing function by spontaneous imbibition of water is weak when the matrix rock surfaces are mixed wet or oil wetted. 裂缝发育的低渗灰岩储层,当基质岩块为混湿及油湿时,毛细渗吸驱油作用很弱。
In recent years, some oolitic limestone oil reservoirs have been discovered successively in Cao-8X well area nearby Gaochang Oilfield and Zhongshi Oilfield. 近年来,在高场油田附近曹8X井区和钟市油田相继发现鲕状灰岩油藏。
Low temperature, high porosity and permeability, strong alkali sensitivity, loose limestone, circulation loss and basal water abundance are the formation characteristics of shallow reservoir in Taobao viscous oil area. 套保稠油区块油藏埋深浅,油层温度低、孔隙度和渗透性高、碱敏性强、岩性疏松、底水丰富,且存在漏层。
The resistivity decreases in logarithm form for the sandstone and limestone of saturated oil. The theoretical analyses and discussion is proposed to explain the experimental result, put forwarded the relevant influence factors and mechanism, and the theoretical curves give a good fit of the experimental result. 而饱油砂岩、石灰岩电阻率则随饱和度呈对数下降.并对实验结果进行了理论分析和讨论.提出了相应的影响因素和机理,且给出了较好的拟合曲线。
Oolitic limestone can form anticlinal reservoirs 、 fault block reservoirs and stratigraphic reservoirs, and is the important reserve resource potential of the oil and gas exploration. 鲕状灰岩可形成背斜油藏、断块油藏、地层油藏,是值得重视的油气勘探后备资源潜力。
Exact Solution to the Pressure Behavior in Imperfect Well in Bottom Water Limestone Oil Reservoir 底水灰岩油藏中不完善井的压力动态精确解
In case that the fractures in limestone contain fluid such as water, oil, or gas, the high frequency component will be absorbed, which leads the sharp attenuation of the energy of seismic wave in high frequency. 当灰岩裂缝中含流体如水、油或气时,地震波的高频成分会被吸收,从而导致高频能量的急剧衰减。
The lithology of the Gasi reservoir is difficult to identify. Most lithology is muddy limestone or algal limestone. It is very difficult to decide the formation lithology just using core observation, oil production testing data, physical property data and conventional logging data. E32地区储层岩性识别困难,岩性不纯,多为泥灰岩或藻灰岩储层,单纯的利用岩心观察,试油资料,物性资料及常规测井资料来判断地层岩性是非常困难的。