Study On Dynamic Performance And Stimulation Techniques Of Hongtai No.2 Block Condensate Gas-Field, Tuha Basin

This dissertation aims at Hongtai 2 Block condensate gas-field. By using plentiful in-site materials, comprehensive study including geological characteristics, dynamic performances and enhanced technologies is carried out. Different methods are used to calculate dynamic reserve of the field."Single-point method"production capacity formula of Hongtai 2 Block gas-filed is derived and production capacity valuation and reasonable production allocation plan are proposed. Schemes such as fracturing scale and parameter optimization, prescription of fracture fluid, selective preference of propping agent are proposed pointedly.By using plentiful materials of drilling, logging, testing and seismic data, this dissertation studies geological characteristics such as structure, sedimentation, reservoir, fluids, pressure and temperature in a systematic way. Reasons that lead to the change of reserve are analyzed in depth. The dissertation give great importance in the study of dynamic performance of Hongtai 2 gas-field, dynamic characteristics includes continuing pressure decline, high-speed production capacity decrease and low elastic production rate. The reservoir pressure has an exponential correlation with cumulative production and gas wells can be divided into three types by gas-producing curves. Material balance method is used to calculate dynamic reserve of Hongtai 2 gas-field. Cumulative production method, fluid material balance method and tube pressure decreasing method were used to calculate single-well control reserve respectively. By using revised isochronal testing results,"single-point method"production capacity formula of Hongtai 2 Block gas-filed is derived and the open-flow capacity is calculated. Aim at underground energy preserving and liquid- carrying, reasonable production allocation plan is studied and reasonable production allocation of Hongtai 2 Block gas-filed was proposed. This thesis made a detailed study of fracturing technology of Hongtai 2 Block gas-field. By using testing, modelling and in-site practice methods, schemes such as fracturing scale and parameter optimization, prescription of fracture fluid, selective preference of propping agent are proposed pointedly. At the same time, operation of HT2-15 gas drilling was studied, three improving advice was proposed.The study results of fracturing technology of Hongtai 2 Block gas-field have obtained great success in in-site practices, study results of geological characteristics and dynamic performances can be used as references in making adjusting plan.