Horizontal Waterflooding in Shuaiba Carbonate Reservoir of Daleel Field in Oman: From Pilots' Performance To Development Era

摘要

Daleel hydrocarbon field is located in Block-5 concession area in North Oman. The field produced oil from a Shuaiba carbonate reservoir for more than ten years in depletion mode initially with vertical wells and then horizontal wells. Due to high depletion in the field and the need of redeveloping the field, horizontal waterflooding was selected as the best mechanism to achieve this after scrutinizing several alternatives. To confirm the selection of the horizontal waterflooding, several pilots were implemented in selected areas of the reservoir, with closely monitoring the performance and behavior of existing and new wells. Pilot results show very favorable initial results in many cases as expected or even better. Owing to these successful results, Daleel field is starting a new era in its history with a completely redeveloped horizontal waterflooding pattern of its two major producing blocks with the expectation to get the maximum recovery. In addition to this, the learnings from the pilot tests and the waterflooding experience gained will be the valuable adding to other blocks in Daleel field and other similar fields worldwide.