Objectives/Scope The shallow depth unconventional reservoir in Northern Kuwait is essentially a monoclinal structure. Sediments have undergone significant shallow depth diagenesis, which resulted in selective oil/water accumulation, controlled mainly by lithological variations. Thus, the reservoir can be classified as stratigraphic-dominant trap. A correlation approach required addressing these variations, which can also be well understood by non-geologist, and the scheme should be appropriate for selection of perforation intervals. Methods, Procedures, Process Reservoir sands are in the form of multi-stacked distributary/fluvial channels. Subsequent to sediment deposition, moderate to intense diagenesis took place. The diagenesis resulted in formation of cemented baffles under low reservoir pressure (250psi) regime. For demarcation of bed boundaries, mapping and modelling purpose the reservoir sand, shale, baffles, gas, water, water above oil, this petrofacies classification method is proposed. The method is well capable of defining the various bed boundaries with fluid/gas content in it with confidence. The method developed after extensive core, core data and log calibration and study. More than one thousand wells correlated. Results, Observations, Conclusions The classification method is simple, yet robust to characterise reservoir vs. non-reservoir variations and oil/gas vs. water quite effectively. Cementation activities typically noticed on top/bottom of the units but many times in between the reservoir sand also. We are able to correlate cemented layers across the area. The cementation also gives rise to water perched above oil phenomenon due to relatively higher capillary pressure in the zone. Oil is migrated post-cementation and occupied reachable pore spaces. Oil also has undergone significant biodegradation because of favourable temperature and restricted nutrient supply. As a result, thin layers of thermal/biodegraded gas also formed locally. The method allows for surface related categorisation representing clean sand, cemented sand, shale, gas/oil/trapped water zones. Novel/Additive Information This unconventional reservoir is being developed with thermal application. Thickness of baffles, barrier, gas, water zones are critical in selection of perforation interval for steam application. This classification method is part of perforation selection for first phase of development and modelling purpose, and it was applied to hundreds of wells, many of them are undergoing production operations successfully.

The Northern part of Kuwait is a highly active development area for deeper gas, intermediate-depth conventional oil and shallow heavy oil. All these developments have overlapping footprints in an already congested area, requiring different development concepts for gas, water flood and steam respectively. Additionally, different Assets manage the respective reservoirs. Integrated Urban Planning across all Assets therefore becomes a vital requirement for realizing all concurrent future developments regarding land use, and enabling close collaboration to leverage synergies among the Assets, utilizing both organizational and new technology-based solutions, in order to maximize value for Kuwait Oil Company (KOC). In North Kuwait Urban Planning is a joint effort between KOC and Shell, with initial focus on establishing an agreement for work methods, effective communications, and protocols with all stakeholders. Next all "as-built" infrastructure and current plans were combined and reviewed. This formed the basis to identify and resolve conflicts, recognize opportunities for reduced land requirements and optimize the development synergies. The approach is underpinned with new technologies, tools, best practices, and concepts like multi-well pad developments, area discounting, exclusion zones, and shared infrastructure and road access corridors, based on global analogue developments. In this paper example field ‘A’ is discussed as it has stacked reservoirs of shallow heavy oil, intermediate conventional oil and deep, sour gas. It requires significant urban planning focus to avoid conflicts and enable synergies. In field A, the shallow heavy-oil development requires large number of wells in a dense well-spacing versus fewer wells targeting the intermediate-depth conventional oil and deeper gas reservoirs, which requires large "safety zones" around well sites. In both cases, common infrastructure like roads, power distribution, flow line and trunkline corridors also need to be considered jointly. Urban Planning collaboration between assets with distinct development challenges can help in creating safe co-development opportunities, thus maximizing value for KOC.