Shunan Changyuan Dam Constructed With Jialing Group Reservoir Evaluation And Gas And Water Distribution Characteristics

In recent years, with the exploration technology rapid development, we have obtained significant breakthrough at Changyuanba Structure Zone Jialingjiang Formation, proved that the Jialingjiang Formation still had big exploration potential, at the same time, the phenomenon of produced the gas and the water simultaneously is commonly. So, the purpose of this paper is continues to deepen the research in Jialingjiang Formation reservoir in the area, analyses the distribution regularities of the reservoir at longitudinal and lateral, carries on the classified evaluation to the reservoir, research the characteristic of gas-water distribution in gas reservoir, provides the basis for the geometric arrangement of well, achieved the purpose of enhancing the success ratio of drilling.This paper is based on the core sample statistical data, the slice, drilling, test, recovery, the log data, production dynamic data, Synthesize using reservoir geology, sedimentology, petroleum geology, mathematics statistics, log interpretation and so on, has researched the Jialing jiang Formation reservoir characteristic and the characteristic of gas-water distribution. Draws the conclusions as follows: The reservoir space of Jialingjiang Formation reservoir in area mainly is the induced porosity, cavern and crack. The crack in Jialingjiang Formation reservoir is developed. Part cracks filled by calcite, argillaceous and y gypsum. Reservoir type mainly is crack-pore and pore. The thickness of reservoir changes great at longitudinal, but the distribution is stable, at lateral, spread as layer. The continuity of T₁j₁⁴～T₁j₃³ reservoir is worse, the continuity of T₁j₂³ reservoir is better than T₁j₂² reservoir, the. continuity of T₁j₁²～T₁j¹ reservoir is better. The Jialingjiang Formation mainly grows II, III kind of reservoir, III kind of reservoir growth more than II, in T₁j₁⁴～T₁j₃³ reservoir segment, the II kind of reservoir only developed at high point of structure in Fujiamiao Structure and the buried structure in south Daguchang Structure; in T₁j² reservoir segment, in partial regions of Changyuanba Structure, Shengongshan Structure and Wutongchang Structure developed II kind of reservoir. There have three types water in Jialingjiang Formation gas reservoir, that is, crack water, edge (bottom )water or water come from other water layer and condensation water, mostly is crack water, edge (bottom )water or water come from other water layer and condensation water is less. The gas reservoir has two types, the crack-pore and the pore, mostly is the crack-pore gas reservoir, just in part area is pore gas reservoir.