Thailand Oil And Gas Upstream Market Size & Share Analysis - Growth Trends and Forecast (2026 - 2031)

Thailand Oil And Gas Upstream Market Trends and Insights

Ramp-up of Erawan/Bongkot Gas Clusters

PTTEP closed its USD 2.8 billion acquisition of Chevron’s domestic portfolio in 2024 and immediately began a drilling and facilities-upgrade campaign aimed at lifting combined output from Erawan and Bongkot to 800 MMSCFD by 2026.^{[1]Investor Relations, “Fourth-Quarter 2024 Presentation,” PTTEP, pttep.com} Integrated control has trimmed per-unit development costs an estimated 15–20% by sharing compression, processing, and logistics assets across neighboring blocks. Alignment with Thailand’s Single Pool Gas Price policy secures predictable long-term margins, enabling enhanced recovery methods in deeper horizons that could stretch field life by up to 10 years. PTTEP’s AI & Robotics Ventures unit deploys predictive-maintenance drones and edge-analytics sensors that have already reduced unplanned downtime across both complexes.

24th & 25th Licensing Rounds Plus PSC Overhaul

The 2024 regulatory reboot introduced production-sharing contracts beside legacy concessions, balancing state revenue capture with investor upside. Eight blocks awarded under the 24th round attracted USD 2.1 billion in committed spending, while the 25th round released 16 onshore areas tailored for unconventional techniques. The PSC construct raises government take during price peaks yet cushions operators during troughs, a feature that is especially attractive for tight-margin, marginal fields. Streamlined environmental approvals now include standardized timelines, reducing the average exploration start-up delay by almost 40% compared to the pre-2024 practice.

LNG-Price Volatility Pushing Domestic Upstream

Asian spot LNG swung between USD 8–15 /MMBtu in 2024, amplifying Thailand’s gas-import bill and prompting policymakers to fast-track domestic field developments. Operators responded by reprioritizing brownfield infill wells and subsea tiebacks with paybacks of under three years. PTT’s offtake portfolio shifted toward indexed domestic supply contracts that hedge exposure to global shocks, underscoring the strategic value of local barrels even when breakevens exceed long-term LNG contract prices.

CCS/EGR Pilots Unlocking Stranded Reserves

Thailand approved full-cycle carbon-storage legislation in 2024, and PTTEP’s Arthit pilot targets injection of 2.5 million t/y CO₂ while lifting an extra 1.5 TCF of gas via pressure support starting 2027.^{[2]Statistics Division, “2024 Petroleum Balance Sheet,” Department of Mineral Fuels Thailand, dmf.go.th} Success would establish engineering templates for 15-plus mature fields, potentially extending their economic life by 10-15 years and aligning with the nation’s 2065 carbon neutrality pledge.

Declining Output from Mature Shallow-Water Fields

Legacy fields drilled between 1980 and 2010 are exhibiting annual decline rates of 8–12% as reservoir pressure drops.^{[3]“Field Decline Analysis Workshop 2024,” Society of Petroleum Engineers Thailand Section, spe.org} Although water-injection and compression upgrades can soften the descent, cost-effective replacement volumes of 200–300 MMCFD each year are still required merely to maintain a flat supply. Remaining reserves reside in tighter compartments, demanding horizontal wells and selective stimulation, both of which are capital-intensive under today’s service-cost inflation.

Lengthy EIA & Community-Consultation Cycles

Mandatory impact assessments for offshore projects within 12 nautical miles of shore draw multi-stakeholder reviews involving fishing, tourism, and environmental groups.^{[4]“National EIA Guidelines,” Office of Natural Resources and Environmental Policy and Planning, onep.go.th} Recent approvals averaged 18–24 months, doubling project lead times compared to regional peers and hindering cash-flow schedules for smaller independents. Onshore unconventional schemes face even wider opposition, further complicating surface-access negotiations.

*Our forecasts treat driver/restraint impacts as directional, not additive. The impact forecasts reflect baseline growth, mix effects, and variable interactions.

Segment Analysis

By Location of Deployment: Offshore Dominance Spurs Tech Shifts

Offshore acreage accounted for 89.10% of Thailand's oil and gas upstream market size in 2025 and is expected to grow at a 5.78% CAGR through 2031. Production is anchored in shallow Gulf waters, where PTTEP integrates Bongkot, Erawan, and Arthit through cross-field pipelines and shared gas-processing trains, thereby driving down unit operating expenses (opex). Deeper plays now entering appraisal may tilt the Thailand oil and gas upstream market toward subsea completion systems and dynamic positioning rigs, lifting capex requirements yet lengthening asset life.

Onshore prospects, which account for just 10.90% of current output, benefit from the new PSC fiscal regime. Exploration focuses on the Khorat Plateau, where tight-sand formations mirror productive analogs in neighboring countries. While infrastructure lags coastal hubs, modular processing skids and trucked LNG could bridge early commercialization gaps until pipeline connectivity improves.

By Resource Type: Gas Infrastructure Anchors Value Chain

Natural gas supplied 77.85% of 2025 volumes thanks to power-sector baseload demand and firm offtake contracts with EGAT. The long-term saturation of gas pipelines and processing plants across the Eastern Seaboard solidifies gas as the price setter for competing liquid barrels. Crude’s 5.66% CAGR outlook stems from deeper-water finds holding higher oil cuts and from brownfield secondary-recovery programs aimed at lifting aggregate liquids yield. High CO₂ ratios in some deep prospects complicate economics, yet upcoming CCS facilities could neutralize these penalties and attract new capital.

By Well Type: Conventional Techniques Face Digital Disruption

Conventional wells retained 84.60% of Thailand's oil and gas upstream market share in 2025, delivering initial gas rates of 15–25 MMCFD at water depths of 30–80 m. Digital twins and real-time downhole sensors keep lifting costs under USD 1.3 per MMBtu. Unconventional programs—still <5% of activity—record a 5.95% CAGR as operators test horizontal drilling and fracture methods optimized for Southeast Asian rock mechanics. Early pilot wells displayed rate-of-penetration gains of 22% after integrating automated bit guidance and AI drilling analytics.

By Service: Exploration Renaissance Takes Shape

Development and production work captured 49.80% of 2025 spending, reflecting ongoing platform upgrades, compression add-ons, and artificial-lift rollouts. However, exploration services are growing at a rate of 6.2% annually as reprocessed seismic data and fresh PSC acreage spark interest in frontier leads. Decommissioning—still in its nascent stages—will scale sharply after 2028, when more than 30 fixed platforms reach the end of their design life, opening tenders for heavy-lift vessels and rigless plug-and-abandon equipment tailored to shallow-water Gulf environments.

Geography Analysis

Thailand's upstream heartland is the central Gulf basin, where Bongkot, Erawan, and Arthit alone supply over 75% of daily gas. Proximity to the Eastern Economic Corridor keeps transport tariffs low and facilitates back-flushing of processed gas liquids into petrochemical feedstocks. To the west, the joint development area with Myanmar contributes roughly 15% of the nation's gas through bilateral transit pipelines; recent political turbulence across the border underscores the strategic value of Thailand-controlled reserves.

Emergent deep-water zones south of existing hubs introduce thicker pay zones but also elevated CO₂ concentrations that require in-situ separation or post-processing. Planned CCS hubs could economically absorb that CO₂, opening the way for higher liquids-rich targets and diversifying the Thailand oil and gas upstream market. Onshore, the Khorat Plateau remains under-drilled. Seismic inversion data suggest 5–8 TCF of tight-gas potential; however, public perception risks and water-use constraints will likely dictate staged pilot approaches before full-field development.

Regulatory Landscape

Thailand upstream petroleum activities are regulated primarily by the Department of Mineral Fuels (DMF) under the Petroleum Committee, with the Petroleum Act, B.E. 2514 (1971), as amended, and the Petroleum Income Tax Act, B.E. 2514 (1971) forming the core legal framework. Petroleum resources belong to the state, and companies participate through awarded concessions or newer contractual structures such as production-sharing contracts (PSCs), alongside service-contract mechanisms. Together, these frameworks define rights to explore, develop, and produce, as well as fiscal obligations.

In March 2026, the government held public hearings on a draft bill to amend the Petroleum Act. The draft includes provisions to address carbon capture and storage (CCS) use in petroleum reservoirs, updated decommissioning obligations, and revised production terms up to 20 years. This amendment process links regulatory priorities to energy-security and cost-volatility concerns, while also formalizing end-of-life and carbon-management requirements for ageing Gulf of Thailand assets.

Market Opportunities and Future Outlook

In Thailand, upstream opportunities are centered on (i) accelerated development and debottlenecking of existing Gulf of Thailand gas hubs and (ii) new acreage access under the licensing framework. PTTEP has disclosed a 2026 budget of USD 7,726 million within a 2026-2030 investment plan of USD 33,279 million, which provides visible capital backing for brownfield drilling, facilities upgrades, and reliability projects tied to domestic supply.

Alongside that, Cabinet approval in August 2025 for the transfer of a 40% participating interest in G1/61 (Erawan) to PTTEP, resulting in sole investorship, creates a clearer decision chain for development sequencing and contractor mobilization on one of Thailand's key gas blocks. White-space for exploration is also widening beyond the mature central Gulf basin, with DMF signaling plans in January 2026 to call for bids in the Andaman Sea and expand frontier activity for seismic, appraisal drilling, and offshore services. Carbon-management capability is another investable gap, with Thailand pairing efforts to reduce production gaps and LNG import exposure with CCS-focused provisions discussed in 2026, and PTTEP's Arthit CCS pilot (final investment decision announced for a project designed to capture up to 1 million tonnes of CO2 per year, with start targeted in 2028) reinforcing demand for CO2 handling, monitoring, and subsurface assurance solutions that can be replicated across mature fields.