| Two-profile logging is applied to guiding development and production of oilfield, and ithas significant function&position in oilfield water-injection development. Two-profilelogging includes oilwell’s liquid-production profiles&water-injection profiles. Theproduction condition or water-injection ability can be known in time through different phasesloggings in the stage of oilfield development, providing scientific bases for water-blocking&perforation, layer adjustment, layer and driving adjustment craft measures or programmelaying out.Currently, two-profile logging craft is very difficult to be applied to low-flow logging inQinghai Oilfield. Logging effects are very bad in the aspect of flow-gathering logging,because liquid amount is lower than turbine’s running discharged amount. In the field ofisotope logging, because of its low water-injection amount&immense perforated layers, ittakes action unapparently or it is polluted seriously, therefore, the accuracy and reliability ofdata-interpretation are reduced remarkably.This paper talked and applied two-profile logging fit for low-flow of Qinghai Oilfield. Itmainly researched separated low liquid-production logging, whose principle is to calculateoil-production amount accurately according to displayed electrode under thegravity-separation action of oil and water, meanwhile, it strengthened logging applications viaimproving and perfecting apparatus continually. For instance, enhancing turbine gauge is usedfor total flow testing. Developed outside diameter apparatus (28mm,21mm) are applied tocasing logging (7",51/2"). Presently,35well times loggings have been completedsuccessfully, solving limitations in flow-gathering logging, and coming to evident applicationeffects especially in testing oil-production amount accurately.This paper mainly dicussed low-flow successive tracing injection profile logging in thefacet of low-injection profile logging, whose craft is mainly using liquid isotope having the same density as water. This liquid isotope has good migration, uneasy to be polluted, and highsuccess rate. In the meantime, this thesis mainly studied relevant interpretation softwares bycontrasting interpretation methods, improving accuracy&efficiency of data interpretation.Presently,35well times loggings have been completely successfully, solving loggingproblems. For example, low-flow isotope is polluted seriously,or it takes action unapparently. |
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