Acidizing Treatment Reconstruction Practice for Limestone Resources

With abundant oil and gas resources, limestone oil and gas resources are characterized by complex composition, uneven distribution, low natural productivity, and susceptibility to contamination, acidizing is an important measure to put this kind of oil and gas wells into production and increase production, but the effect of acidizing measure varies from block to block. This paper attempts to identify the difficulties in acidizing process by analyzing the reservoir character of multiple limestone reservoir systems in D Oilfield region, and to finalize matrix acidizing, retarded acidizing fracturing and multi-stage injection fracturing as three alternatives through single-well and block analysis, according to the permeability, pore throat development and lithological character. After the acidizing measure was implemented, good results were attained.