Oasis Midstream Partners LP /zigman2/quotes/209896981/composite OMP +2.66% shares rose 5% on Tuesday after the pipeline company said it agreed to be acquired by Crestwood Equity Partners LP /zigman2/quotes/203439273/composite CEQP +3.53% in a deal valued at $1.8 billion, including debt. The payment includes $160 million in cash plus 33.8 million shares of newly issued Crestwood common units, with plans to close in the first quarter. Crestwood shares fell about 2%. Houston-based Crestwood said the deal will add to its leading position in the Williston Basin. Crestwood said it expects to realize about $45 million in commercial and cost reduction synergies. It also expects to capture more than $20 million in incremental annual cash flow over the next several years by integrating Crestwood and Oasis Midstream pipelines.