Accurate prediction method for full-well-section formation pore pressure of developed old oil field

• Main Authors: ZONG JIE, SUN HONGWEI, SONG QINGRU, ZHU HONGYUN, WANG JIANBO, NIE FENYI, HE HAIBO, MA WENHUA, WANG XINGMING, HOU LU, LUO BO, SUN YUCHUN, ZHANG ZHIPAN
• Format: Patent
• Language: Chinese; English
• Published: 24.02.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses a method for accurately predicting the pore pressure of a full-well-section stratum of a developed old oil field. The method comprises the following steps: acquiring pore pressure data of the full-well-section stratum of the developed old oil field; calculating a pressure coefficient value of the full-well-section stratum of the developed old oil field; obtaining pressure test data of target layers of all adjacent wells in the full-well-section stratum of the developed old oil field; screening all the pressure test data of the target layer of the adjacent well; calibrating the pressure coefficient value according to a screening result; and obtaining a full-well-section formation pore pressure value according to a calibration result. According to the method for accurately predicting the pore pressure of the full-well-section stratum of the developed old oil field provided by the invention, the pressure coefficient of the full-well-section pores of the new drilling well is comprehensivel