| 1. | Although warped by compaction, there is only slight folding of the sandstone lenses .
虽然由于压实作用而弯曲，但砂岩体褶皱很轻微。 |
| 2. | In many sedimentary basins the salinity of the formation water increases with depth or compaction .
在许多沉积盆地中，地层水的含盐量随深度或压实作用而增高。 |
| 3. | The diageneses mainly comprise cementation , compaction and dissolition
主要成岩作用有机械压实作用、胶结作用和溶蚀作用。 |
| 4. | The mechanical compaction is a main factor , which caused the loss of porosity
机械压实作用是导致砂岩储层孔隙丧失的主要原因。 |
| 5. | The formation of polygonal fault is associated with early compaction of sediments and fluid expulsion
它的形成与沈积物的早期压实作用和流体排出作用有关。 |
| 6. | It was primarily formed by undercompaction , hydrocarbon generation and tectonic compression
柴北缘异常高压主要由欠压实作用、生烃作用及构造挤压作用形成。 |
| 7. | During diagenetic process , the main factor destroying porosity is function of pressure and cementation . secondary porosity formem formed by unsteady mineral is beneficial to formation ' s development
成岩作用中，压实作用、胶结作用、自生粘土矿物的沉淀是破坏孔隙的主要因素；不稳定矿物溶蚀形成的次生孔隙有利于储层的发育。 |
| 8. | The major diagenetic events include mechanical compaction , chemical compaction , cementation , replacement and dissolution . the reservoir quality experienced from being destroyed to being enhanced during the whole diagenetic evolution process
主要的成岩作用有：机械压实作用，化学压实作用，胶结作用，交代作用以及溶蚀作用。 |
| 9. | The diagenesis may result in the variations in pore structures of sandstone reservoirs ; the compression and cementation may lead to the decrease in valid primary porosity of sandstones , and the secondary porosity generated by solution may serve as main oil storage spaces
压实作用和胶结作用降低了砂岩的原生孔隙度，溶解作用产生的次生孔隙成为主要的汕气储集空间。 |
| 10. | Abstract : yanchang series is a typical low permeability reservoir , and its favourable sandstone reservoir is delta facies . heavy compaction , cementation and heterogeneity exist in it . according to the analysis of the main control factors of forming the secondary pore , it is held that the secondary pore in longdong area is controlled by both favorable facies belt and abnormal formation pressure . it is also held that the formation of the abnormal formation pressure is due to the dewatering of the clay mineral during diagenesis because the dewatering time is identical with the decarboxylation time of organism . organic acid and co2 are driven to adjacent favorable reservoirs under the abnormal formation pressure , and a lot of secondary pore is produced in the runners . from the present exploration result , it is useful to predicting the development of secondary pore to study the distribution of abnormal formation pressure
文摘:陕甘宁盆地三叠系延长统是国内外典型的低渗特低渗油田，储集层主要为三角洲砂体，压实作用和胶结作用强烈，储层非均质性非常严重，因此预测次生孔隙发育带是寻找油气聚集带的关键.通过对陕甘宁盆地陇东地区延长统次生孔隙形成的主控因素分析，认为陕甘宁盆地延长统次生孔隙的形成除了受沉积有利相带控制外，还与地层异常压力的作用密切相关.研究认为陇东地区异常压力的形成机理主要由于成岩过程中粘土矿物脱水作用.粘土矿物大量脱水时间正好与有机质脱羧期相一致，从而在异常压力作用下将生油岩中的大量有机酸及co2带到与之相邻的储集层中，并沿着有利储集相带运移，在酸性水经过的地方形成大量的次生孔隙，为后期油气运聚提供有利通道及宿住空间，从现今的勘探结果来看，通过研究地层异常压力纵横向分布特征，并结合有利相带研究预测次生孔隙育良带是行之有效的方法 |
