Research On The Control System Of Oil Extraction Joint Station Based On PLC

Acidization with temporary plugging means using the carrier fluid to bring temporary plugging agent into the field to seal high permeable layer,then squeeze the acid and acidize medium and low permeable layers,or add the temporary plugging agent to acid liquor and squeeze them together into the stratum.The temporary plugging agent enters into the high permeable layer first,which forced the acid to enter into medium and low layers later to got the target of temporary plugging acidization.M oil field is a typical low permeable and dense field,whose penetration rate is from a few millidarcy to dozens of or even hundreds of millidarcy.During the water-flooding,the anisotropism around the water injection well is very obvious.If we employ conventional acidizaiton technique,the acid liquor usually enters into the high permeable layer in priority,which will thus make the penetration rate higher and lead to more obvious anisotropism consequently.The paper evaluated(temporary plugging)property and compatibility for two kinds of temporary plugging agent commonly used in the field to M reservoir stratum.A granular-type of temporary plugging agent formula with adjustable grain size,good dispersity,long suspension time and good water solubility(with CCZD-1 as a major research object)and an acid soluble gel-type of temporary plugging agent with gel strength of more than 10000mPa·s,gelling time between 4-8h have been developed by indoor experiments;the article also gave an evaluation to temporary plugging property and its compatibility with plugging removal agent for the two types of agent.We can determine that it's feasible for the temporary plugging acidizing formula that prepared by experiments to be applied to water well of M oil field through indoor core simulation experiments and practical application ones to the water injection wells with temporary plugging acidization demands in the field.