Oasis Petroleum has realized significant cost savings through its Oasis Well Services (OWS) subsidiary and will be targeting savings on the midstream side through Oasis Midstream Services (OMS). Oasis formed the midstream venture when it transferred salt water disposal and other midstream assets to the subsidiary.

Creating subsidiaries for oilfield and midstream services allows the company to realize costs savings through vertical integration. Being split out as subsidiaries also makes them much easier to divest if the company chooses to do so in the future.

"The momentum of our operational success continued into the first quarter, as we again exceeded our production guidance and drove down our average capital cost per well by 5% to $8.4 million, excluding the impact of Oasis Well Services," said Thomas B. Nusz, CEO.

The company saved an additional $0.3 million per well through OWS to lower total capital expenditures to $8.1 million per well.

Bakken production surpassed 30,000 boe/d in the quarter, but is expected to hold relatively flat in the second quarter as the company transitions to pad drilling. Full year production guidance has been increased to 31,000-34,000 boe/d.