Reserves Analysis Of Fractured Gas Reservoirs In The Hot Spring Springs

Fractured gas reservoir in the domestic gas reservoirs have been found widely distributed,it is very important to develop efficient and practical significance. Due to the hidden cracks chi complex internal structure and fracture distribution, gas reservoir heterogeneity is strong, there is a huge difference, causes the single well production characteristic for the calculation of reserves of the gas reservoir has brought great difficulties. Fractured gas reservoir and matrix cracks in two media, channeling affected matrix cracks, the gas reservoir is more difficult to reach a stable steady state or intends to conventional reserves calculation method is not applicable to fractured gas reservoir (wells), requiring seeking new reserves calculation.In this paper, fractured gas reservoir at home and abroad on the basis of the research literature to mine in eastern Sichuan hot spring wells fractured gas reservoir (wells), for example, about the geological and production characteristics of the block, were suitable for the gas reservoir (wells) the reserves are calculated and evaluated. According fractured gas reservoir flow characteristics, and scholars from home and abroad to establish a dual media vertical wells and horizontal wells flow model, the use of programming drawn theoretical chart for the calculation of reserves behind providing a theoretical basis. Using the volumetric method, material balance method and the equivalent method for calculation of reserves target block carried on the practical application of each method were compared and analyzed, the preferred method suitable for the gas reservoir.When a single well be fractured gas reservoir reserve calculation, because the straight and horizontal wells percolation model is not the same, so there are differences in calculation methods. For the pressure drop curve method, material balance equation combined with deliverability testing method, material balance equation combined with transient testing method and elastic two-phase method are compared Combined with the actual target blocks the production of static and dynamic data, select the material balance equation combined with deliverability testing method for single-well reserves are calculated dynamically control the material balance equation combined with transient testing method and an elastic two-phase method. By comparing the results of the final analysis of the pros and cons of various methods exist, look for ways to control fractured gas reservoir single well suited for reserves calculation.