Edge water breakthrough in each of the major zones within mishrif reservoir in west qurna phase 1

Abstract EN

The Mishrif reservoir (Upper Cretaceous) considered the main discovered and developed reservoir at West Qurna I field in southern Iraq and has been on production intermittently since 1999.

Mishrif reservoir has been deviated into six main zones from youngest to oldest are mA, CRI, mB1, CRII, mB2 & mC.

The West Qurna Phase I Field (WQI) has pressure depletion since production commenced in 1999.

More than 450 wells penetrated Mishrif Formation, to date, almost all of the production has been from the Mishrif formation (2180 to 2505 m true vertical depth, subsea) with minor oil production from the Lower Cretaceous Zubair formations.

Geoscientist and reservoir engineers are looking for producing dry oil especially there are limited surface facilities at West Qurna phase 1, for that purpose and as part of Reservoir Management, It was very important to monitor the Formation & injection water movement across Mishrif reservoir with the time.

Cased hole logs (Saturation logs & Production logs) and Open hole logs for new drill wells are being integrated to describe the water encroachment in Mishrif in order to Study behavior of aquifer movement and water injection, Validate the geologic reservoir model, assess the vertical and horizontal water sweep & enhance perforation strategies.

In West Qurna 1 (from 2010 to date) have been ran more than 500 PLTs (Production logs) and 300 PNLs (Saturation logs) and open hole logs for new drill wells, all these logs have been analysis and interpreted (using Geolog &Emeraude software) then were created different water movement maps for each main productive zone mA, mB1 & mB2 in 2013, 2014 & 2016 (by Petrel).

Different water encroachment behavior among the different zones due to heterogeneity in reservoir rock quality, Integrating production rate allocated by zone with water encroachment maps shows excellent relationship between production and flood front by zone, the maps showed that quicker water movement in the Meshrif reservoir compared to the model, these maps are using for perforation strategy, and the maps will be updated periodically every 12 months.

considered the main discovered and developed reservoir at West Qurna I field in southern Iraq and has been on production intermittently since 1999.

Mishrif reservoir has been deviated into six main zones from youngest to oldest are mA, CRI, mB1, CRII, mB2 & mC.

The West Qurna Phase I Field (WQI) has pressure depletion since production commenced in 1999.

More than 450 wells penetrated Mishrif Formation, to date, almost all of the production has been from the Mishrif formation (2180 to 2505 m true vertical depth, subsea) with minor oil production from the Lower Cretaceous Zubair formations.

Geoscientist and reservoir engineers are looking for producing dry oil especially there are limited surface facilities at West Qurna phase 1, for that purpose and as part of Reservoir Management, It was very important to monitor the Formation & injection water movement across Mishrif reservoir with the time.

Cased hole logs (Saturation logs & Production logs) and Open hole logs for new drill wells are being integrated to describe the water encroachment in Mishrif in order to Study behavior of aquifer movement and water injection, Validate the geologic reservoir model, assess the vertical and horizontal water sweep & enhance perforation strategies.

In West Qurna 1 (from 2010 to date) have been ran more than 500 PLTs (Production logs) and 300 PNLs (Saturation logs) and open hole logs for new drill wells, all these logs have been analysis and interpreted (using Geolog &Emeraude software) then were created different water movement maps for each main productive zone mA, mB1 & mB2 in 2013, 2014 & 2016 (by Petrel).

Different water encroachment behavior among the different zones due to heterogeneity in reservoir rock quality, Integrating production rate allocated by zone with water encroachment maps shows excellent relationship between production and flood front by zone, the maps showed that quicker water movement in the Meshrif reservoir compared to the model, these maps are using for perforation strategy, and the maps will be updated periodically every 12 months.