The Countermeasures Research Of Development Technical In Low Yield And Inefficient Wells Of Su-48Blocks

As the complexity and diversity of Sulige gas field gas reservoir and with the production continually, many blocks exist the situation of low yield and inefficient wells. Therefore, this paper studied su-48blocks and propose some certain technical measures is very necessary.According to well area overview, to classify by average daily production and casing drawdown rate, and then make a production rule analyze for classification gas well. Using fuzzy comprehensive evaluation method to determine the evaluation factors, including reservoir thickness, matrix porosity, matrix permeability, gas saturation, casing pressure before production, open flow potential, casing drawdown rate, average daily production, dynamic reserve, degree of reserve recovery, liquid loading situation; and then calculate the degree of membership; consider static factors and dynamic factors were25%and75%to distribute weight; to calculate single well evaluation factor, based on the evaluation factor combined with liquid loading and economic, determined87low yield and inefficient wells in this area. Using three parameters facilitate future proposed more targeted potential tapping measures including average daily production, casing drawdown rate and liquid loading situation to make a cause analysis for the classified low yield and inefficient wells.Through experience method and gas production index curve method to give a reasonable well production for low yield and inefficient wells, determined the proration scope for each type of wells. Proposed potential tapping adaptation analysis for gas well throttling technology or not and drainage gas methods commonly used in Su-48blocks. For determined low yield and inefficient wells and adaptation analysis, put forward specific potential tapping measures for each type of low yield and inefficient wells, including improved drainage gas process system, reasonable well production, design and salvage for bean, check layer reshooting and so on. Summary a general method of potential tapping measures for each type of low yield and inefficient wells.